C++ Fibonacci

#include "stdafx.h"
#include <iostream>

using namespace std;

int main()
{
    int x = 1, y = 0, z;
    cin >> z;
    for (int i = 1; i <= z; i++)
    {
        if (i % 2 == 0)
        {
            x += y;
            cout << x << endl;
        }
        else
        {
            y += x;
            cout << y << endl;
        }
    }
    system("pause");
    return 0;
}