// arrival.h: the Arrival class, representing arrival events.

class Arrival : public Event {
private:

   // doesCarBalk: decide whether a car should balk.
   // Deciding whether to balk is an activity that forms part of the arrival
   // event, so this method belongs among the event routines.
   int doesCarBalk (double litres, int queueLength);

   // interarrivalTime: the time until the next arrival, from an exponential
   // distribution.
   double interarrivalTime ();

public:

   // Constructor.
   // The call "Event (time) is like Java's "super (time)".
   Arrival (double time) : Event (time) { }

   // makeItHappen: arrival event routine.
   void makeItHappen ();
};