Armstrong Number in C

Armstrong Number :

The number which the sum of the cube of its digits is equal to that number is known as Armstrong Number.

for example:

number = 153

Total digits in 153 is 3

 Now, 1^3 + 5^3 + 3^3  = 1 + 125 + 27 = 153

Program to check whether a number is Armstrong Number

#include<stdio.h>

int main()

{

     int num, r, sum =0, temp;

     

     printf("Enter a number \n");

     scanf("%d",&num);

     

     temp = num;

     while(num>0) {

            r = num%10;

            sum = sum + ( r * r * r );

            num  = num / 10;

     }

     

    if ( sum = = temp )

            printf("%d is a armstrong number \n", num);

    else

            printf("%d is not a armstrong number \n",num);

   

    return 0 ;

}