FIND THE SUM OF THE DIGITS OF A GIVEN NUMBER 786= 7+8+6=21

#include<stdio.h>

#include<conio.h>

void main()

{

 int n,n1,r,s=0;

 clrscr();

 printf("Enter any number:-\n");

 scanf("%d",&n);

 n1=n;

 do

 {

  r=n%10;

  s=s+r;

  n=n/10;

 }while(n>0);

 printf("The sum of a digit of %d is:- %d",n1,s);

 getch();

}