factorial.cpp

#include <iostream>
using namespace std;

int factorial(int x){
  if (x == 0)
  return 1;
  else {
    int recurso = factorial(x-1);
    int res = x * recurso;
    return res;
  }
}

int main(){
  int x, y;
  cout << "Introdusca un numero para calcular su factorial: ";
  cin >> x;
  y = factorial(x);
  cout << "\nEl factorial es: " << y;
  return 0;
}