qt_main.cpp

#include "mainwindow.h"
#include <QApplication>
#include "Game.h"

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow *w = new MainWindow;

    Game *g = new Game(w);
    g->setFocus();

    w->show();

    return a.exec();
}