Qt timer problem

[anh5kor]

Hello,

I want to add a time on my design which starts with formate 00:00:00 and my number should keep on increasing every seconds.
I tried to add the code

showtime()
{
QTime time =QTime::currentTime();
    QString time_text = time.toString("hh:mm:ss");
    ui.clock->setText(time_text);
}
constructor()
{
 QTimer *timer = new QTimer(this);
connect(timer,SIGNAL(timeout()),this,SLOT(showtime()));
timer->start();
}

showtime()
{
QTime time =QTime::currentTime();
    QString time_text = time.toString("hh:mm:ss");
    ui.clock->setText(time_text);
}
constructor()
{
 QTimer *timer = new QTimer(this);
connect(timer,SIGNAL(timeout()),this,SLOT(showtime()));
timer->start();
}

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but I am getting my system time.
I want it should start from zero and keep on increasing every second.
Please let me know some solution.