#include <stdio.h>
 
int main()
 
{
 
   int n, sum = 0, t, remainder;
 
   printf("\nPlease enter a number to find whether it is an armstrong or not");
 
   scanf("%d",&n);
 
 
 
   t = n;
 
 
 
   while( t != 0 )
 
   {
 
      remainder = t%10;
 
      sum = sum + remainder*remainder*remainder;
 
      t = t/10;
 
   }
 
   if ( n == sum )
 
      printf("\nThe number %d is an armstrong number", n);
 
   else
 
      printf("\nThe number %d is not an armstrong number", n);
 
   return 0;
 
}

output:

Please enter a number to find whether it is an armstrong or not 3

The number 3 is not an armstrong number