#includeIn the above example, a vertical layout is created using the QVBoxLayout class. Three labels are then added to the layout using the addWidget() function. The setLayout() function is then used to set the layout of the widget. Overall, the QWidget layout in C++ is an essential component for creating flexible, user-friendly interfaces for desktop, mobile, and embedded platforms, and such layouts can be efficiently implemented using Qt.int main(int argc, char *argv[]) { QApplication app(argc, argv); QWidget *widget = new QWidget; QVBoxLayout *layout = new QVBoxLayout(widget); QLabel *label1 = new QLabel("Label 1"); QLabel *label2 = new QLabel("Label 2"); QLabel *label3 = new QLabel("Label 3"); layout->addWidget(label1); layout->addWidget(label2); layout->addWidget(label3); widget->setLayout(layout); widget->show(); return app.exec(); }