Go4Expert - Class: Class():Sensor(),rsensor(),rvelocity(){}

Dear c++ gurus, i have thk all over wat is means by the following hightlighted text, but not understood, can anyone explain to me what do they mean? or how do they function?

Code:

      class RotationSensor : public Sensor {

      public:



      RotationSensor(const Port port, int position = 0)

           : Sensor((Sensor::Port) port, true),

            rsensor((port == S1) ? ROTATION_1 :

           (port == S2) ? ROTATION_2 :

            ROTATION_3)

   

     #ifdef CONF_DSENSOR_VELOCITY

              ,

             rvelocity((port == S1) ? VELOCITY_1 :

                          (port == S2) ? VELOCITY_2 :

                          VELOCITY_3)

     #endif // CONF_DSENSOR_VELOCITY

       {

       on(); //! Turn on tracking of the sensor

       pos(position); //! Set the current position

       }

 

      ..........................................................

       }

How does the following function/run/do/etc?

RotationSensor(...) : Sensor (...), rsensor(...), rvelocity(...)
{
on();
pos(position);
}

wat does this block of codes represent? or do? or how it function?

Thanks guru.