#include<QtWidgets> int main(int argc,char *argv[]) { QApplication a(argc,argv); QWidgeQT实验四

QT += widgets

SOURCES += \

    main.cpp

#include<QtWidgets>

int main(int argc,char *argv[])

{

    QApplication a(argc,argv);

    QWidget *widget=new QWidget();

    widget->setWindowTitle(QObject::tr("我是widget"));

    QLabel *label=new QLabel();

    label->setWindowTitle(QObject::tr("我是label"));

    label->setText(QObject::tr("label:我是个窗口"));

    label->resize(180,20);

    QLabel*label2=new QLabel(widget);

    label2->setText(QObject::tr("label2:我不是独立窗口，只是widget的子部件"));

    label2->resize(250,20);

    label->show();

    widget->show();

    int ret = a.exec();

    delete label;

    delete widget;

    return ret;
}结果：