1 #include<QApplication>
 2 #include<QWidget>
 3 #include<QSpinBox>
 4 #include<QSlider>
 5 #include<QHBoxLayout>
 6 
 7 int main (int argc,char *argv[])
 8 {
 9     QApplication app(argc, argv);
10     QWidget * window = new QWidget;
11     window->setWindowTitle("ENTER your age");
12     QSpinBox *spinBox = new QSpinBox;
13     QSlider *slider = new QSlider(Qt::Horizontal);
14     spinBox->setRange(0,130);
15     slider->setRange(0,130);
16     QObject::connect(slider,SIGNAL(valueChanged(int)),spinBox,SLOT(setValue(int)));
17     QObject::connect(spinBox,SIGNAL(valueChanged(int)),slider,SLOT(setValue(int)));
18     spinBox->setValue(35);
19     QHBoxLayout*layout=new QHBoxLayout;
20     layout->addWidget(spinBox);
21     layout->addWidget(slider);
22     window->setLayout(layout);
23     window->show();
24     return app.exec();
25 }