int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QTableWidget table;
    table.setRowCount(3);
    table.setColumnCount(3);

    QLineEdit *lineEdit;
    lineEdit = new QLineEdit;
    table.setCellWidget(1, 0, lineEdit);

    lineEdit = new QLineEdit;
    table.setCellWidget(1, 1, lineEdit);

    lineEdit = new QLineEdit;
    table.setCellWidget(1, 2, lineEdit);

    table.resize(400, 200);
    table.show();
    
    return a.exec();
}