Armstrong Number

#include<stdio.h>

#include<math.h>

void main()

{

int num,dup,rem,sum=0;

clrscr();

printf("Enter a number : ");

scanf("%d",&num);

dup=num;

while(num>0)

{

rem=num%10;

sum+=pow(rem,3);

num/=10;

}

if(dup==sum)

 printf("\nIt is an Amstrong number");

else

 printf("Not an Amstrong number");

getch();

}