problem with start timer

[ramin.lich]

hi
every time when i press the push Button Timer will Add 1 sec
I Want To Start Timer And Goes Up Like Stopwatch

{
        ui->setupUi(this);
        _second=0;
        _time.setHMS(0,0,0,0);
        startTimer(1000);
    }
 
    MainWindow::~MainWindow()
    {
        delete ui;
    }
 
    void MainWindow::on_timerEvent_clicked()
    {
        _second++;
        QTime t= _time.addSecs(_second);
        ui->LCurrenTtime->setText(t.toString());
    }

{
        ui->setupUi(this);
        _second=0;
        _time.setHMS(0,0,0,0);
        startTimer(1000);
    }
     
    MainWindow::~MainWindow()
    {
        delete ui;
    }
     
    void MainWindow::on_timerEvent_clicked()
    {
        _second++;
        QTime t= _time.addSecs(_second);
        ui->LCurrenTtime->setText(t.toString());
    }

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what im doing wrong?