duck.h

Head First设计模式在C++上的实现

#pragma once
#include "FlyBehavior.h"
#include "QuackBehavior.h"

class CDuck
{
protected:	
	CFlyBehavior *flyBehavior;
	CQuackBehavior *quackBehavior;
public:
	CDuck(void);
	~CDuck(void);

	virtual void display()=0;
	void PerformFly()
	{
		flyBehavior->fly();
	}
	void PerformQuack()
	{
		quackBehavior->quack();
	}
	void swim()
	{
		std::cout<<"All ducks float, even decoys!\n";
	}
	void setFlyBehavior(CFlyBehavior *fb)
	{
		flyBehavior =fb;
    }
	void setQuackBehavior(CQuackBehavior *qb)
	{
		quackBehavior =qb;
    }
};

class CMallardDuck :
	public CDuck
{
public:
	CMallardDuck(void);
	~CMallardDuck(void);
	virtual void display();
};

class CModelDuck :
	public CDuck
{
public:
	CModelDuck(void);
	~CModelDuck(void);
	void display();
};