P11916 - Approximation of e

#include <iostream>
using namespace std;

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

int main() {
  cout.setf(ios::fixed);
  cout.precision(10);

  double n;
   while (cin >> n) {
     double total = 0;
     for (int i = 0; i < n; ++i) {
       total += (1/factorial(i));
     }
     cout << "With " << int(n) << " term(s) we get " << total << '.' << endl;
   }
 }