Write a C program to check whether a number is armstrong or not.

#include<stdio.h>

main()
{
      int num,temp,flag=0,sum=0;
      printf("\nEnter a number=");
      scanf("%d",&num);
      temp=num;
      while(num)
      {
          r=num%10;
          sum=sum+r*r*r;
          num=num/10;
      }
      if(sum==temp)
          printf("\n%d is an armstrong number",temp);
      else
          printf("\n%d is not an armstrong number",temp);
}