lab 11 z1 FATAL ERROR

#include <iostream>
#include <cmath>

using namespace std;

double calc(int y, int);

int main()
{
    double x;
    int n;
    cout << "Enter n: " << endl;
    cin >> n;
    int i = 1;
    x = calc(n, i);
    cout << "Your result: " << x << endl;
    return 0;
}

 double calc(int y, int i)
{
    double rez = 0;
    if (i >= y)
    {
        rez = 1+1./3;
    }
    else
    {
        rez = i + (1./calc(y, (i + 2)));
    }
    return rez;
}