#include <QApplication>
#include <QWidget>
#include <QPushButton>
#include <QMessageBox>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    QWidget window;
    window.setWindowTitle("Message Box Example");

    QPushButton errorButton("Show Error Message", &window);
    errorButton.move(20, 20);

    QPushButton infoButton("Show Information Message", &window);
    infoButton.move(20, 50);

    QObject::connect(&errorButton, &QPushButton::clicked, [&]() {
        QMessageBox::critical(&window, "Error", "An error occurred. Please try again.");
    });

    QObject::connect(&infoButton, &QPushButton::clicked, [&]() {
        QMessageBox::information(&window, "Information", "This is an information message.");
    });

    window.resize(250, 100);
    window.show();

    return app.exec();
}