QT入门 HelloWorld

1、打开Qt Creator新建项目类型为"Qt Widgets Application".

3、注释并修改为如下代码(在main.cpp中)#include <QAppli罕铞泱殳cation>#足毂忍珩include <QMessageBox>int main(int argc, char *argv[]){ QApplication a(argc, argv); QMessageBox::information((QWidget *)QApplication::desktop(),"提示","这是一个消息框"); return a.exec();}