Armstrong number

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

void main()
{

int a,b,sum=0,n;
clrscr();

printf("enter no:");
scanf("%d",&n);

b=n;

while(n>0)
{
a=n%10;
sum=sum+(a*a*a);
n=n/10;
}

if(b==sum)
{
printf("Armstrong no");
}
else
{
printf("Not Armstong no");
}

getch();
}