Qt4 Gossip: QLineEdit

#include <QApplication>
#include <QLabel>
#include <QLineEdit>
#include <QIntValidator>
#include <QGridLayout>

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

    QWidget *window = new QWidget;
    window->setWindowTitle("QLineEdit");
    
    QLabel *nameLabel = new QLabel("Name");
    QLabel *pwdLabel = new QLabel("Password");
    QLabel *luckyLabel = new QLabel("Lucky Number");
    
    QLineEdit *nameLine = new QLineEdit;
    QLineEdit *pwdLine = new QLineEdit;
    pwdLine->setEchoMode(QLineEdit::Password);
    QLineEdit *luckyLine = new QLineEdit;
    luckyLine->setValidator(new QIntValidator(luckyLine));
            
    QGridLayout *layout = new QGridLayout;
    
    layout->addWidget(nameLabel, 0, 0);
    layout->addWidget(nameLine, 0, 1);
    layout->addWidget(pwdLabel, 1, 0);
    layout->addWidget(pwdLine, 1, 1);
    layout->addWidget(luckyLabel, 2, 0);
    layout->addWidget(luckyLine, 2, 1);
            
    window->setLayout(layout);
    window->show(); 

    return app.exec();
}