Program in C to add three digits entered by keyboard

Write a program in C to add three digits entered by keyboard

#include <stdio.h>

void main ()
{
            int no,r,res;
            clrscr ();
            printf ("Enter any value: ");
            scanf ("%d",&no);
            r=res=0;
            while (no>0)
            {
                        r=no%10;
                        no=no/10;
                        res=(res+r);
            }
            printf ("Sum is %d",res);
            getch ();
}


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