#include<QApplication>

 #include<QWidget>

 #include<QSpinBox>

 #include<QSlider>

 #include<QHBoxLayout>

 int main (int argc,char *argv[])

 {

     QApplication app(argc, argv);

     QWidget * window = new QWidget;

     window->setWindowTitle("ENTER your age");

     QSpinBox *spinBox = new QSpinBox;

     QSlider *slider = new QSlider(Qt::Horizontal);

     spinBox->setRange(,);

     slider->setRange(,);

     QObject::connect(slider,SIGNAL(valueChanged(int)),spinBox,SLOT(setValue(int)));

     QObject::connect(spinBox,SIGNAL(valueChanged(int)),slider,SLOT(setValue(int)));

     spinBox->setValue();

     QHBoxLayout*layout=new QHBoxLayout;

     layout->addWidget(spinBox);

     layout->addWidget(slider);

     window->setLayout(layout);

     window->show();

     return app.exec();

 }