Example: HARSHAD Number or Not in C using Do-while loop

C
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// HARSHAD Number or Not in C using Do-while loop
#include <stdio.h>

// It's the main function of the program
int main()
{
    int num, sum = 0;

    // Step-1 Take an input from the User
    printf("INPUT A NUMBER: ");
    scanf("%d", &num);

    // Step-2 Store the input value into another variable
    int original = num;

    // Step-3 Use a loop to check the Harshad number
    do
    {
        sum += original % 10;
        original /= 10;
    } while (original != 0);

    // Step-4 Compare the input value with the sum of divisors of the input value
    if (num % sum == 0)
        printf("\n%d IS A HARSHAD NUMBER\n", num);
    else
        printf("\n%d IS NOT A HARSHAD NUMBER\n", num);

    return 0;
}