使用按钮为C++创建计数器

#include <QtWidgets>

class MyWidget : public QWidget {
public:
    MyWidget(QWidget *parent = nullptr) : QWidget(parent) {
        QVBoxLayout *layout = new QVBoxLayout(this);
        QPushButton *button = new QPushButton("Click me", this);
        QLabel *label = new QLabel(this);
        layout->addWidget(button);
        layout->addWidget(label);

        connect(button, &QPushButton::clicked, this, [label]() {
            static int count = 0;
            count++;
            label->setText(QString("Count: %1").arg(count));
        });
    }
};

int main(int argc, char *argv[]) {
    QApplication app(argc, argv);
    MyWidget widget;
    widget.show();
    return app.exec();
}