#include <qapplication.h>#include "weatherballoon.h"int main(int argc, char *argv[]){    QApplication app(argc, argv);    WeatherBalloon balloon;    balloon.setCaption(QObject::tr("Weather Balloon"));    app.setMainWidget(&balloon);    QObject::connect(&balloon, SIGNAL(clicked()),                     &app, SLOT(quit()));    balloon.show();    return app.exec();}