1  #include "mainwindow.h"
2  #include "ui_mainwindow.h"

3  MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow)
4  {
5    ui->setupUi(this);
6  }

7  MainWindow::~MainWindow()
8  {
9    delete ui;
10 }


11 void MainWindow::on_pushButton_clicked()
12  {
13    ui->label->setText("Welcome to Qt");
16  }
