//------------------------------------------------------------------------
//  class Car - inheritance
//------------------------------------------------------------------------
public class Car extends MotorVehicle {

  protected int numberWheels = 4;
  protected int numberDoors;

  // constructors
   public Car()
   {}

  public Car(String licensePlate, double maxSpeed,
   String make, String model, int year, int numberOfPassengers,
   int numberOfDoors) {
    this(licensePlate, 0.0, maxSpeed, make, model, year, numberOfPassengers,
     numberOfDoors);
  }
  public Car(String licensePlate, double speed, double maxSpeed,
   String make, String model, int year, int numberOfPassengers) {
    this(licensePlate, speed, maxSpeed, make, model, year,
     numberOfPassengers, 4);
  }
  public Car(String licensePlate, double speed, double maxSpeed,
   String make, String model, int year, int numberOfPassengers,
   int numberOfDoors) {
    super(licensePlate, speed, maxSpeed, make, model, year, numberOfPassengers);
    this.numberDoors = numberOfDoors;
  }
  public int getNumberOfWheels() {
    return this.numberWheels;
  }
  public int getNumberOfDoors() {
    return this.numberDoors;
  }
}