Armstrong Number

#include<stdio.h>;

main()
{
   int num,n,sum,r;
   clrscr();
   printf("Enter a Number for Armstrong Check\n\n");
   scanf("%d",&num);
   n=num;
   sum=0;
   while(n!=0)
   {
      r=n%10;
      sum=sum+r*r*r;
      n=n/10;
   }
   if(sum==num)
     printf("\n %d is an Armstrong no. \n",num);
   else
     printf("\n %d is not an Armstrong No.\n",num);
}

Output----->