#include "widget2.h"

Widget2::Widget2(QWidget *parent) : QWidget(parent)
{
    setWindowTitle("题目2");
    setFixedSize(800,600);

    btn = new QPushButton("按钮",this);
    btn->setFixedSize(200,100);
    btn->move(10,10);

    label = new QLabel("占位",this);
    label->resize(300,200);
    label->move(10,130);

    connect(btn,&QPushButton::clicked,[&]()->void{
                label->setText("1+1=2");
            });
}