c program to find armstrong number

armstrong number means the sum of cubic digits of any number is equal to that number. for eg. any number is 153 then 1*1*1+5*5*5+3*3*3=153 so 153 is armstrong number.

#include <stdio.h>

 

int power(int, int);

 

int main()

{

   int n, sum = 0, temp, remainder, digits = 0;

 

   printf("Input an integer\n");

   scanf("%d", &n);

 

   temp = n;

   // Count number of digits

   while (temp != 0) {

      digits++;

      temp = temp/10;

   }

   

   temp = n;

   

   while (temp != 0) {

      remainder = temp%10;

      sum = sum + power(remainder, digits);

      temp = temp/10;

   }

 

   if (n == sum)

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

   else

      printf("%d isn't an Armstrong number.\n", n);

 

   return 0;

}

 

int power(int n, int r) {

   int c, p = 1;

   

   for (c = 1; c <= r; c++)

      p = p*n;

     

   return p;  

}