Check Armstrong Number or not in C.

#include<stdio.h>
#include<conio.h>

void main()
{
    int n,r,t,sum=0;
    clrscr();

    printf("  OUTPUT :\n");
    printf("\tEnter a No.");
    scanf("%d",&n);
    t=n;
    while(n!=0)
    {
         r = n%10;
         sum=sum+r*r*r;
         n=n/10;
    }
    if(sum==t)
       printf("The no. %d is armstrong",t);
   else
       printf("The no. %d is not an armstrong",t);
   getch();
}