#include <QApplication>
#include <QPushButton>
003 int main(int argc, char *argv[])
004 {
005 QApplication app(argc, argv);
006 QPushButton *button = new QPushButton("Quit");
007 QObject::connect(button, SIGNAL(clicked()),
008 &app, SLOT(quit()));
009 button->show();
010 return app.exec();
011 }
Qt?s widgets emit signals to i