#ifndef QTTIMER_H

 #define QTTIMER_H

 #include <QDialog>

 namespace Ui {

 class qttimer;

 }

 class qttimer : public QDialog

 {

     Q_OBJECT

 public:

     explicit qttimer(QWidget *parent = );

     ~qttimer();

 private:

     Ui::qttimer *ui;

     int count;

 private slots:

     void slottimedown();

 };

 #endif // QTTIMER_H

 #include "qttimer.h"

 #include <QTime>

 #include <QTimer>

 #include <QLabel>

 #include <QDateTime>

 #include "ui_qttimer.h"

 qttimer::qttimer(QWidget *parent) : count()

     , QDialog(parent),

     ui(new Ui::qttimer)

 {

     ui->setupUi(this);

     QTimer *time_clock = new QTimer(this);

     connect(time_clock, SIGNAL(timeout()), this, SLOT(slottimedown()));

     time_clock->start();

 }

 qttimer::~qttimer()

 {

     delete ui;

 }

 void qttimer::slottimedown()

 {

     QString value;

     ui->timelabel->setText(value.setNum(count++));

     QDateTime time = QDateTime::currentDateTime();

     QString str = time.toString("yyyy-MM-dd dddd hh:mm:ss");

     ui->datelabel->setText(str);

 }

 #include "qttimer.h"

 #include <QApplication>

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

 {

     QApplication a(argc, argv);

     qttimer w;

     w.show();

     return a.exec();

 }