Revision control
++ // Copyright (C) 2016 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ //! [0]
++ /* Add C includes here */
++
++ #if defined __cplusplus
++ /* Add C++ includes here */
++
++ # include <iostream>
++ # include <QApplication>
++ # include <QPushButton>
++ # include <QLabel>
++ #endif
++ //! [0]