C PROGRAM TO test the given number is an ARMSTRONG NUMBER or not

#include<stdio.h>
#include<conio.h>
#include<math.h>

main()
{
      int num,snum,sum,digit;

      clrscr();

      printf("\n\n Enter a number to test : ");
      scanf("%d",&num);

      snum = num;
      sum = 0;

      while(num>0)
      {
                  digit = num % 10;
                  sum = sum + pow(digit,3);
                  num = num / 10;
      }

      if( snum == sum)
          printf("\n\n The given number %d is an ARMSTRONG NUMBER\n\n",snum);
      else
          printf("\n\n The given number %d is not an ARMSTRONG NUMBER\n\n",snum);

      return 0;
}