/* g++ -o qtutorial qtutorial.cpp -I /usr/include/qt6/QtWidgets/ -I * /usr/include/qt6/ -I /usr/include/qt6/QtGui/ -lQt6Core -lQt6Gui * -lQt6Widgets */ #include <qapplication.h> #include <qpushbutton.h> #include <qfont.h> int main( int argc, char **argv ) { QApplication a( argc, argv ); QPushButton quit( "Quit", 0 ); quit.resize( 150, 60 ); quit.setFont( QFont( "Times",36,QFont::Bold ) ); QObject::connect( &quit, SIGNAL(clicked()), &a, SLOT(quit())); //a.setMainWidget( &quit ); quit.show(); return a.exec(); }