qt-creator/tests/manual/debugger/gui/tst_gui.cpp

// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only WITH Qt-GPL-exception-1.0

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

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    qDebug() << "pid=" <<  QApplication::applicationPid();
    Foo::MainWindow w;
    w.show();
    return a.exec();
}