#include "mainwindow.h" #include "ui_mainwindow.h" static uint32_t counter = 0U; MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent) , ui(new Ui::MainWindow) { ui->setupUi(this); } MainWindow::~MainWindow() { delete ui; } void MainWindow::on_pushButton_clicked() { counter++; ui->lcdNumber->display(QString::number(counter)); }