Example: Armstrong Number Checker in C

C
C++
C#
Java
Python
PHP
// Armstrong Number Checker
#include <stdio.h>

int main() {
    int num, originalNum, remainder, sum = 0;

    // Step 1: Prompt user for input and read the number
    printf("Enter a three-digit integer: ");
    scanf("%d", &num);

    originalNum = num; // Store the original number for comparison later

    // Step 2: Loop to extract digits and calculate the sum of cubes
    while (originalNum != 0) {
        remainder = originalNum % 10; // Get the last digit
        sum += remainder * remainder * remainder; // Add cube of the digit to sum
        originalNum /= 10; // Remove the last digit
    }

    // Step 3: Compare the sum with the original number using if-else
    if (sum == num) {
        printf("%d is an Armstrong number.\n", num);
    } else {
        printf("%d is not an Armstrong number.\n", num);
    }

    return 0;
}