#ifndef WINDOW_H
#define WINDOW_H
#include <iostream>
using namespace std;

class window {                                          //grandparent
        int i;
public:
        window(int init_i): i {init_i} {
                cout << "construct window " << i << "\n";
        }

        ~window() {cout << "destruct window " << i << "\n";}
};

#endif