increment a number based on condition

Sruthi Dominic :

I have a basic question, I have realtime data. I need to count number of times the data value crosses a threshold.

realtime_data is a data stream at a rate of 10Hz.

I tried this:

 int pCount=0;

    if(realtime_data>0.25)
    {
        ++pCount;
        ui->lbl_peak->setText(QString::number(pCount));
    }

But this does increment only one time. Does not count all the occurrences. Can someone show me the right way to do this?

EDIT

This is how I call realtime_data:

void Settings::EventHandler(uint8_t index, DATA_T *sample)
{
    realtimeDataSlot(sample->sensor_value[0]);
}


void Settings::realtimeDataSlot(double realtime_data)
{

// Here I need to check if the data exceeds a threshold value and count those occurrences

    int pCount=0;

   if(realtime_data>0.25)
    {
        ++pCount;
        ui->lbl_peak->setText(QString::number(pCount));
    }

}

Eelke :

You have declared pCount in your realtimeDataSlot function which means that everytime the function is called pCount is back to 0. Make pCount a member variable of your class.