Write a C Program to Check a number is Armstrong or not

#include<stdio.h>

void main()

{

    int n, sum = 0, t, r;


    printf("Please enter a number: ");        

    scanf("%d",&n);


    for(t=n;t>0;t=t/10)

    {

        r = t%10;

        sum = sum + r*r*r;

    }

     if ( n == sum )

        printf("%d is an armstrong number.",n);

    else

        printf("%d is not an armstrong number.",n);

}