carfactory.h

C++高级编程这本书所附的源代码

/**
 * CarFactory.h
 */

// For this example, the Car class is assumed to already exist.
#include "Car.h"

class CarFactory
{
 public:
  CarFactory();

  Car* requestCar();

  int getNumCarsInProduction() const;

 protected:
  virtual Car* createCar() = 0;

 private:
  int mNumCarsInProduction;
};

class FordFactory : public CarFactory
{
 protected:
  virtual Car* createCar();
};

class ToyotaFactory : public CarFactory
{
 protected:
  virtual Car* createCar();
};