Program to find the sum of digits of an integer

Program:

#include<stdio.h>
#include<conio.h>
void main()
{
    int n, r, s = 0;
    clrscr();
    printf("Enter a number : ");
    scanf("%d", &amp;n);
    while(n > 0)
    {
        r = n % 10;
        s = s + r;
        n = n / 10;
    }
    printf("\nThe sum of the digits is : %d", s);
    getch();
}

Output:

Enter a number : 12345
The sum of the digits is : 15