10_4.cpp

一个qt设计的教程

#include <qapplication.h>
#include <qwidget.h>
#include <qmessagebox.h>

class MyMainWindow:public QWidget
{
 public:
    MyMainWindow();
 private:
    QMessageBox *mbox;
};

MyMainWindow::MyMainWindow()
{
 setGeometry(100,100,200,50);
 mbox = new QMessageBox("Proceed ?","Do you want to proceed ?",
                         QMessageBox::Critical,
                         QMessageBox::Ok | QMessageBox::Default,
                         QMessageBox::Cancel | QMessageBox::Escape,0);
 mbox->show();
}

main(int argc,char **argv)
{
 QApplication a(argc,argv);
 MyMainWindow w;

 a.setMainWidget(&w);
 w.show();
 a.exec();
}