Example: Fibonacci Sequence Generator in C++

// Fibonacci Sequence Generator
#include <iostream>

int main() {
    int n;

    // Step 1: Prompt the user for the number of terms
    std::cout << "Enter the number of terms for the Fibonacci sequence: ";
    std::cin >> n;

    // Step 2: Handle edge cases for n
    if (n < 0) {
        std::cout << "Please enter a non-negative integer." << std::endl;
        return 1; // Indicate an error
    } else if (n == 0) {
        std::cout << "Fibonacci Sequence: (empty)" << std::endl;
    } else if (n == 1) {
        std::cout << "Fibonacci Sequence: 0" << std::endl;
    } else {
        // Step 3: Initialize the first two Fibonacci numbers
        int first = 0;
        int second = 1;

        std::cout << "Fibonacci Sequence: " << first << ", " << second;

        // Step 4: Use a loop to generate and print the remaining terms
        for (int i = 2; i < n; ++i) {
            int next = first + second; // Calculate the next number
            std::cout << ", " << next; // Print the next number
            first = second;            // Update 'first' to the previous 'second'
            second = next;             // Update 'second' to the newly calculated 'next'
        }
        std::cout << std::endl;
    }

    return 0;
}