// car.h: the Car class, representing cars.

class Car {
private:
   double arrivalTime;
   double litresNeeded;

public:
   // Constructor.
   //
   // The number of litres required is a property of a car, so it belongs in
   // this class. It is also something the car "knows" when it arrives, so it
   // should be calculated in the constructor.
   //
   // The distribution of litres required is uniform between 10 and 60
   // (that is, sim->litresNeededMin and sim->litresNeededMin + sim->
   // litresNeededRange).
   Car ();

   // getArrivalTime: return the car's arrival time.
   double getArrivalTime () { return arrivalTime; }

   // getLitresNeeded: return the number of litres of fuel needed by the car.
   double getLitresNeeded () { return litresNeeded; }

   // setArrivalTime: set the car's arrival time.
   void setArrivalTime (double time) { arrivalTime = time; }
};