#include <QApplication>
#include <QPushButton>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QPushButton *newbtn = new QPushButton(QObject::tr("OK"));
    QObject::connect(newbtn, SIGNAL(clicked()), &app, SLOT(quit()));
    newbtn->resize(180,40);
    newbtn->show();
    return app.exec();
}