팩토리얼 (Factorial)

#include <iostream>
using namespace std;

int factorial(unsigned int n)
{
 if (n == 0)
  return 1;
 else
  return n*factorial(n-1);
}

int main()
{
 int N;

 cout << "\n\n" 
  << "N=? \n>>";
 //scanf("%d",&N);
 cin >> N;

 cout << "\n"
  << N << "! = " << factorial(N) << endl;

 return 0;
}