7.1.c — Decision Making, Input Validation & Interactive Menus

<< 7.1 Overview

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Decision making in programs

Every non-trivial program must make decisions based on inputs, state, or environment. This chapter focuses on practical patterns.

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Input validation patterns

Pattern 1: Required field check

function validateRequired(value, fieldName) {
    if (value === null || value === undefined || value === "") {
        return `${fieldName} is required`;
    }
    return null;
}

#include <string>
#include <optional>
using namespace std;

optional<string> validateRequired(const string& value, const string& fieldName) {
    if (value.empty()) {
        return fieldName + " is required";
    }
    return nullopt;
}

Pattern 2: Type check

function validateNumber(value) {
    if (typeof value !== "number" || Number.isNaN(value)) {
        return "Must be a valid number";
    }
    return null;
}

Pattern 3: Range check

function validateRange(value, min, max) {
    if (value < min || value > max) {
        return `Must be between ${min} and ${max}`;
    }
    return null;
}

optional<string> validateRange(int value, int minVal, int maxVal) {
    if (value < minVal || value > maxVal) {
        return "Must be between " + to_string(minVal) + " and " + to_string(maxVal);
    }
    return nullopt;
}

Pattern 4: Format check (email)

function validateEmail(email) {
    if (!email) return "Email is required";
    const atIdx = email.indexOf("@");
    if (atIdx < 1) return "Missing @ or empty local part";
    const dotIdx = email.lastIndexOf(".");
    if (dotIdx <= atIdx + 1) return "Missing domain";
    if (dotIdx === email.length - 1) return "Missing TLD";
    return null;
}

Pattern 5: Composite validation

function validateSignup(data) {
    const errors = {};

    if (!data.username || data.username.length < 3) {
        errors.username = "Username must be at least 3 characters";
    }
    if (!data.email || !data.email.includes("@")) {
        errors.email = "Valid email required";
    }
    if (!data.password || data.password.length < 8) {
        errors.password = "Password must be at least 8 characters";
    }
    if (data.password !== data.confirmPassword) {
        errors.confirmPassword = "Passwords do not match";
    }

    return Object.keys(errors).length > 0 ? errors : null;
}

#include <map>
#include <string>
using namespace std;

struct SignupData {
    string username, email, password, confirmPassword;
};

map<string, string> validateSignup(const SignupData& data) {
    map<string, string> errors;
    if (data.username.size() < 3)
        errors["username"] = "Username must be at least 3 characters";
    if (data.email.find('@') == string::npos)
        errors["email"] = "Valid email required";
    if (data.password.size() < 8)
        errors["password"] = "Password must be at least 8 characters";
    if (data.password != data.confirmPassword)
        errors["confirmPassword"] = "Passwords do not match";
    return errors;
}

---

Interactive menus

Console menu with validation loop

const readline = require("readline");
const rl = readline.createInterface({ input: process.stdin, output: process.stdout });

function showMenu() {
    console.log("\n=== Task Manager ===");
    console.log("1. Add task");
    console.log("2. View tasks");
    console.log("3. Mark complete");
    console.log("4. Delete task");
    console.log("5. Exit");
}

function handleChoice(choice) {
    switch (Number(choice)) {
        case 1: console.log("Adding task..."); return true;
        case 2: console.log("Viewing tasks..."); return true;
        case 3: console.log("Marking complete..."); return true;
        case 4: console.log("Deleting task..."); return true;
        case 5: console.log("Goodbye!"); return false;
        default:
            console.log("Invalid choice. Please enter 1-5.");
            return true;
    }
}

#include <iostream>
using namespace std;

void showMenu() {
    cout << "\n=== Task Manager ===" << endl;
    cout << "1. Add task" << endl;
    cout << "2. View tasks" << endl;
    cout << "3. Mark complete" << endl;
    cout << "4. Delete task" << endl;
    cout << "5. Exit" << endl;
}

bool handleChoice(int choice) {
    switch (choice) {
        case 1: cout << "Adding task..." << endl; return true;
        case 2: cout << "Viewing tasks..." << endl; return true;
        case 3: cout << "Marking complete..." << endl; return true;
        case 4: cout << "Deleting task..." << endl; return true;
        case 5: cout << "Goodbye!" << endl; return false;
        default:
            cout << "Invalid choice. Please enter 1-5." << endl;
            return true;
    }
}

int main() {
    int choice;
    bool running = true;
    while (running) {
        showMenu();
        cout << "Enter choice: ";
        cin >> choice;
        running = handleChoice(choice);
    }
    return 0;
}

---

Decision tree: practical example

Loan approval decision tree

                    ┌──────────────────┐
                    │ Credit Score     │
                    │   >= 700?        │
                    └───┬──────────┬───┘
                    yes │          │ no
                        ▼          ▼
                ┌───────────┐  ┌───────────┐
                │ Income    │  │ Score     │
                │ >= 50K?   │  │ >= 600?   │
                └──┬─────┬──┘  └──┬─────┬──┘
               yes │     │ no  yes│     │no
                   ▼     ▼       ▼      ▼
              APPROVED  REVIEW  REVIEW  DENIED

function loanDecision(creditScore, income) {
    if (creditScore >= 700) {
        if (income >= 50000) {
            return "APPROVED";
        } else {
            return "REVIEW";
        }
    } else if (creditScore >= 600) {
        return "REVIEW";
    } else {
        return "DENIED";
    }
}

string loanDecision(int creditScore, int income) {
    if (creditScore >= 700) {
        return income >= 50000 ? "APPROVED" : "REVIEW";
    } else if (creditScore >= 600) {
        return "REVIEW";
    }
    return "DENIED";
}

---

Role-based access control

function checkAccess(user, resource) {
    if (!user) return { allowed: false, reason: "Not authenticated" };

    switch (user.role) {
        case "admin":
            return { allowed: true, reason: "Admin has full access" };
        case "editor":
            if (resource.type === "article") {
                return { allowed: true, reason: "Editors can edit articles" };
            }
            return { allowed: false, reason: "Editors cannot access this resource" };
        case "viewer":
            if (resource.action === "read") {
                return { allowed: true, reason: "Viewers can read" };
            }
            return { allowed: false, reason: "Viewers have read-only access" };
        default:
            return { allowed: false, reason: "Unknown role" };
    }
}

---

Error handling with conditionals

function divideNumbers(a, b) {
    if (typeof a !== "number" || typeof b !== "number") {
        throw new TypeError("Both arguments must be numbers");
    }
    if (Number.isNaN(a) || Number.isNaN(b)) {
        throw new RangeError("NaN is not allowed");
    }
    if (b === 0) {
        throw new RangeError("Cannot divide by zero");
    }
    return a / b;
}

#include <stdexcept>
double divideNumbers(double a, double b) {
    if (b == 0.0) {
        throw std::runtime_error("Cannot divide by zero");
    }
    return a / b;
}

---

Scenario bank (decision making & validation)

7.1c-001 — Validate a phone number format with country code (variation 1)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-002 — Build a multi-step wizard with conditional navigation (variation 2)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-003 — Implement retry logic with exponential backoff conditions (variation 3)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-004 — Create a permission matrix for CRUD operations (variation 4)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-005 — Validate a date string in YYYY-MM-DD format (variation 5)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-006 — Build a tax calculator with progressive brackets (variation 6)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-007 — Implement a state machine for a vending machine (variation 7)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-008 — Validate a JSON schema with nested conditions (variation 8)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-009 — Create a routing decision based on URL pattern (variation 9)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-010 — Build a notification priority system (variation 10)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-011 — Implement a grading curve with adjustable thresholds (variation 11)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-012 — Validate inter-dependent form fields (variation 12)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-013 — Create a dynamic pricing engine with rules (variation 13)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-014 — Implement feature flags with user segmentation (variation 14)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-015 — Build a conditional middleware chain (variation 15)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-016 — Validate file upload (type, size, dimensions) (variation 16)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-017 — Create a decision tree for customer support routing (variation 17)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-018 — Implement rate limiting with conditional responses (variation 18)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-019 — Build an A/B test selector with weighted conditions (variation 19)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-020 — Validate a credit card number with Luhn algorithm (variation 20)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-021 — Validate a phone number format with country code (variation 21)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-022 — Build a multi-step wizard with conditional navigation (variation 22)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-023 — Implement retry logic with exponential backoff conditions (variation 23)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-024 — Create a permission matrix for CRUD operations (variation 24)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-025 — Validate a date string in YYYY-MM-DD format (variation 25)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-026 — Build a tax calculator with progressive brackets (variation 26)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-027 — Implement a state machine for a vending machine (variation 27)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-028 — Validate a JSON schema with nested conditions (variation 28)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-029 — Create a routing decision based on URL pattern (variation 29)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-030 — Build a notification priority system (variation 30)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-031 — Implement a grading curve with adjustable thresholds (variation 31)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-032 — Validate inter-dependent form fields (variation 32)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-033 — Create a dynamic pricing engine with rules (variation 33)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-034 — Implement feature flags with user segmentation (variation 34)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-035 — Build a conditional middleware chain (variation 35)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-036 — Validate file upload (type, size, dimensions) (variation 36)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-037 — Create a decision tree for customer support routing (variation 37)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-038 — Implement rate limiting with conditional responses (variation 38)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-039 — Build an A/B test selector with weighted conditions (variation 39)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-040 — Validate a credit card number with Luhn algorithm (variation 40)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-041 — Validate a phone number format with country code (variation 41)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-042 — Build a multi-step wizard with conditional navigation (variation 42)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-043 — Implement retry logic with exponential backoff conditions (variation 43)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-044 — Create a permission matrix for CRUD operations (variation 44)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-045 — Validate a date string in YYYY-MM-DD format (variation 45)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-046 — Build a tax calculator with progressive brackets (variation 46)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-047 — Implement a state machine for a vending machine (variation 47)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-048 — Validate a JSON schema with nested conditions (variation 48)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-049 — Create a routing decision based on URL pattern (variation 49)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-050 — Build a notification priority system (variation 50)

• Level: Beginner
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-051 — Implement a grading curve with adjustable thresholds (variation 51)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-052 — Validate inter-dependent form fields (variation 52)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-053 — Create a dynamic pricing engine with rules (variation 53)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-054 — Implement feature flags with user segmentation (variation 54)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-055 — Build a conditional middleware chain (variation 55)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-056 — Validate file upload (type, size, dimensions) (variation 56)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-057 — Create a decision tree for customer support routing (variation 57)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-058 — Implement rate limiting with conditional responses (variation 58)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-059 — Build an A/B test selector with weighted conditions (variation 59)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-060 — Validate a credit card number with Luhn algorithm (variation 60)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-061 — Validate a phone number format with country code (variation 61)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-062 — Build a multi-step wizard with conditional navigation (variation 62)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-063 — Implement retry logic with exponential backoff conditions (variation 63)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-064 — Create a permission matrix for CRUD operations (variation 64)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-065 — Validate a date string in YYYY-MM-DD format (variation 65)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-066 — Build a tax calculator with progressive brackets (variation 66)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-067 — Implement a state machine for a vending machine (variation 67)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-068 — Validate a JSON schema with nested conditions (variation 68)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-069 — Create a routing decision based on URL pattern (variation 69)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-070 — Build a notification priority system (variation 70)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-071 — Implement a grading curve with adjustable thresholds (variation 71)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-072 — Validate inter-dependent form fields (variation 72)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-073 — Create a dynamic pricing engine with rules (variation 73)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-074 — Implement feature flags with user segmentation (variation 74)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-075 — Build a conditional middleware chain (variation 75)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-076 — Validate file upload (type, size, dimensions) (variation 76)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-077 — Create a decision tree for customer support routing (variation 77)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-078 — Implement rate limiting with conditional responses (variation 78)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-079 — Build an A/B test selector with weighted conditions (variation 79)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-080 — Validate a credit card number with Luhn algorithm (variation 80)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-081 — Validate a phone number format with country code (variation 81)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-082 — Build a multi-step wizard with conditional navigation (variation 82)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-083 — Implement retry logic with exponential backoff conditions (variation 83)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-084 — Create a permission matrix for CRUD operations (variation 84)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-085 — Validate a date string in YYYY-MM-DD format (variation 85)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-086 — Build a tax calculator with progressive brackets (variation 86)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-087 — Implement a state machine for a vending machine (variation 87)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-088 — Validate a JSON schema with nested conditions (variation 88)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-089 — Create a routing decision based on URL pattern (variation 89)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-090 — Build a notification priority system (variation 90)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-091 — Implement a grading curve with adjustable thresholds (variation 91)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-092 — Validate inter-dependent form fields (variation 92)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-093 — Create a dynamic pricing engine with rules (variation 93)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-094 — Implement feature flags with user segmentation (variation 94)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-095 — Build a conditional middleware chain (variation 95)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-096 — Validate file upload (type, size, dimensions) (variation 96)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-097 — Create a decision tree for customer support routing (variation 97)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-098 — Implement rate limiting with conditional responses (variation 98)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-099 — Build an A/B test selector with weighted conditions (variation 99)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-100 — Validate a credit card number with Luhn algorithm (variation 100)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-101 — Validate a phone number format with country code (variation 101)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-102 — Build a multi-step wizard with conditional navigation (variation 102)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-103 — Implement retry logic with exponential backoff conditions (variation 103)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-104 — Create a permission matrix for CRUD operations (variation 104)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-105 — Validate a date string in YYYY-MM-DD format (variation 105)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-106 — Build a tax calculator with progressive brackets (variation 106)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-107 — Implement a state machine for a vending machine (variation 107)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-108 — Validate a JSON schema with nested conditions (variation 108)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-109 — Create a routing decision based on URL pattern (variation 109)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-110 — Build a notification priority system (variation 110)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-111 — Implement a grading curve with adjustable thresholds (variation 111)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-112 — Validate inter-dependent form fields (variation 112)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-113 — Create a dynamic pricing engine with rules (variation 113)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-114 — Implement feature flags with user segmentation (variation 114)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-115 — Build a conditional middleware chain (variation 115)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-116 — Validate file upload (type, size, dimensions) (variation 116)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-117 — Create a decision tree for customer support routing (variation 117)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-118 — Implement rate limiting with conditional responses (variation 118)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-119 — Build an A/B test selector with weighted conditions (variation 119)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-120 — Validate a credit card number with Luhn algorithm (variation 120)

• Level: Intermediate
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-121 — Validate a phone number format with country code (variation 121)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-122 — Build a multi-step wizard with conditional navigation (variation 122)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-123 — Implement retry logic with exponential backoff conditions (variation 123)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-124 — Create a permission matrix for CRUD operations (variation 124)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-125 — Validate a date string in YYYY-MM-DD format (variation 125)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-126 — Build a tax calculator with progressive brackets (variation 126)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-127 — Implement a state machine for a vending machine (variation 127)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-128 — Validate a JSON schema with nested conditions (variation 128)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-129 — Create a routing decision based on URL pattern (variation 129)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-130 — Build a notification priority system (variation 130)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-131 — Implement a grading curve with adjustable thresholds (variation 131)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-132 — Validate inter-dependent form fields (variation 132)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-133 — Create a dynamic pricing engine with rules (variation 133)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-134 — Implement feature flags with user segmentation (variation 134)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-135 — Build a conditional middleware chain (variation 135)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-136 — Validate file upload (type, size, dimensions) (variation 136)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-137 — Create a decision tree for customer support routing (variation 137)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-138 — Implement rate limiting with conditional responses (variation 138)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-139 — Build an A/B test selector with weighted conditions (variation 139)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-140 — Validate a credit card number with Luhn algorithm (variation 140)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-141 — Validate a phone number format with country code (variation 141)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-142 — Build a multi-step wizard with conditional navigation (variation 142)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-143 — Implement retry logic with exponential backoff conditions (variation 143)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-144 — Create a permission matrix for CRUD operations (variation 144)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-145 — Validate a date string in YYYY-MM-DD format (variation 145)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-146 — Build a tax calculator with progressive brackets (variation 146)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-147 — Implement a state machine for a vending machine (variation 147)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-148 — Validate a JSON schema with nested conditions (variation 148)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-149 — Create a routing decision based on URL pattern (variation 149)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-150 — Build a notification priority system (variation 150)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-151 — Implement a grading curve with adjustable thresholds (variation 151)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-152 — Validate inter-dependent form fields (variation 152)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-153 — Create a dynamic pricing engine with rules (variation 153)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-154 — Implement feature flags with user segmentation (variation 154)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-155 — Build a conditional middleware chain (variation 155)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-156 — Validate file upload (type, size, dimensions) (variation 156)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-157 — Create a decision tree for customer support routing (variation 157)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-158 — Implement rate limiting with conditional responses (variation 158)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-159 — Build an A/B test selector with weighted conditions (variation 159)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-160 — Validate a credit card number with Luhn algorithm (variation 160)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-161 — Validate a phone number format with country code (variation 161)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-162 — Build a multi-step wizard with conditional navigation (variation 162)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-163 — Implement retry logic with exponential backoff conditions (variation 163)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-164 — Create a permission matrix for CRUD operations (variation 164)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-165 — Validate a date string in YYYY-MM-DD format (variation 165)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-166 — Build a tax calculator with progressive brackets (variation 166)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-167 — Implement a state machine for a vending machine (variation 167)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-168 — Validate a JSON schema with nested conditions (variation 168)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-169 — Create a routing decision based on URL pattern (variation 169)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.

7.1c-170 — Build a notification priority system (variation 170)

• Level: Advanced
• Context: Real-world decision-making scenario requiring conditional logic.
• Approach: Identify inputs, define decision rules, implement with appropriate conditional form.
• JS implementation: Write a function with proper input validation and error handling.
• C++ implementation: Apply the same logic using C++ idioms (optional, exceptions, etc.).
• Testing: Verify with normal inputs, boundary values, and invalid inputs.