Faktorial Menggunakan Perulangan

#include <iostream.h>
#include <conio.h>
#include <windows.h>

int main()
{
int bil, n,ulang;
long int hasil;
do
{
cout<< "n = ";
cin>> n;
hasil = 1;
for (bil = n; bil >= 1; bil--)
{hasil = hasil * bil;}
cout<< "n! = "<< hasil << "\n";;

cout<<"\nCoba Lagi?(Y/N)";
ulang=getche();
clrscr();

}while(ulang=='Y' ||ulang=='y' );
abort();
}