#Quiz4

#Quiz4

#include <iostream>
#include <iomanip>
using namespace std;

int factorial(int x)
{
  if (x == 1 || x == 0)
  {
    return 1;
  }
  else
  {
    return x * factorial(x - 1);
  }
}
float euler_calc(float y)
{
  float x = 0.0, answer = 0.0;
  do
  {
    answer += 1.0/(factorial(x));
    x = x + 1;
  }

while(x <= y);
  return answer;
}
int main()
{
  float y, answer, x = 0.0;
  cout << "Tell me a number: \n ";
  cin >> y;
  cout << "The answer is " << euler_calc(y) << endl;
}