<![CDATA[Windows: C++ does not support default-int]]>void MainWindow::keyPressEvent(QKeyEvent *event) { qDebug() << event; ui->statusBar->showMessage(event->text()); if (event->key() == Qt::Key_Escape) { ui->pushButton_Esc->setChecked(true); } .... }

Linux has no error.

Windows error:
moc_mainwindow.cpp

QT_INIT_METAOBJECT const QMetaObject MainWindow::staticMetaObject = {
{ &QMainWindow::staticMetaObject, qt_meta_stringdata_MainWindow.data,
      qt_meta_data_MainWindow,  qt_static_metacall, nullptr, nullptr}
};

error C4430: missing type specifier - int assumed. Note: C++ does not support default-int

]]>https://forum.qt.io/topic/94063/windows-c-does-not-support-default-intRSS for NodeTue, 18 Aug 2026 10:41:16 GMTMon, 27 Aug 2018 09:47:18 GMT60<![CDATA[Reply to Windows: C++ does not support default-int on Mon, 27 Aug 2018 09:58:43 GMT]]>@sonichy

You should indicate for which line the error is output.

I would assume that it is

    qDebug() << event;

You are simply trying to output an address there. That is probably open to debate if you want to treat as error or not.
If you are really interested in the address only, than cast it as an integer.

]]>https://forum.qt.io/post/478348https://forum.qt.io/post/478348Mon, 27 Aug 2018 09:58:43 GMT<![CDATA[Reply to Windows: C++ does not support default-int on Mon, 27 Aug 2018 09:57:20 GMT]]>@sonichy
In which line is the error raised?
Typically, some symbol has only been forward-declared, but the corresponding header file has not been included.

]]>https://forum.qt.io/post/478347https://forum.qt.io/post/478347Mon, 27 Aug 2018 09:57:20 GMT