Example: Decimal to Base 9 Conversion in C++

// Decimal to Base 9 Conversion
#include <iostream>
#include <string>    // Required for std::string
#include <algorithm> // Required for std::reverse

int main() {
    // Step 1: Declare variables
    int decimalNum;
    std::string base9Num = ""; // To store the base 9 representation

    // Step 2: Prompt user for input
    std::cout << "Enter a decimal number: ";
    std::cin >> decimalNum;

    // Handle the special case for 0
    if (decimalNum == 0) {
        base9Num = "0";
    } else {
        // Step 3: Perform repeated division
        int tempNum = decimalNum;
        while (tempNum > 0) {
            int remainder = tempNum % 9; // Get the remainder
            base9Num += std::to_string(remainder); // Convert remainder to string and append
            tempNum /= 9; // Divide the number by 9
        }
        // Step 4: Reverse the collected remainders
        std::reverse(base9Num.begin(), base9Num.end());
    }

    // Step 5: Display the result
    std::cout << "Decimal " << decimalNum << " in Base 9 is: " << base9Num << std::endl;

    return 0;
}