学步园

#include <iostream>
#include <string>
using namespace std;

//
struct IPhone
{
public:
	IPhone() { }
	virtual ~IPhone() { }

	virtual void ShowDecorate() = 0;
};

class CApplePhone : public IPhone
{
public:
	CApplePhone(string name) : m_name(name) { }
	virtual ~CApplePhone() { }

	virtual void ShowDecorate() { cout<<m_name<<" "; }

private:
	string m_name;
};

class CNokiaPhone : public IPhone
{
public:
	CNokiaPhone(string name) : m_name(name) { }
	virtual ~CNokiaPhone() { }

	virtual void ShowDecorate() { cout<<m_name<<" "; }

private:
	string m_name;
};

//
struct IDecorate : public IPhone
{
public:
	IDecorate(IPhone *pPhone) : m_pPhone(pPhone) { }
	virtual ~IDecorate() { }

	virtual void ShowDecorate() { m_pPhone->ShowDecorate(); }

private:
	IPhone *m_pPhone;
};

class CDecorateA : public IDecorate
{
public:
	CDecorateA(IPhone *pPhone) : IDecorate(pPhone) { }
	virtual ~CDecorateA() { }

	virtual void ShowDecorate() { IDecorate::ShowDecorate(); AddDecorate();  }

private:
	void AddDecorate() { cout<<"挂件"<<endl; }
};

class CDecorateB : public IDecorate
{
public:
	CDecorateB(IPhone *pPhone) : IDecorate(pPhone) { }
	virtual ~CDecorateB() { }

	virtual void ShowDecorate() { IDecorate::ShowDecorate(); AddDecorate(); }

private:
	void AddDecorate() { cout<<"贴膜"<<endl; }
};

//
void main()
{
	CApplePhone Phone("apple");

	CDecorateA decorate(&Phone);

	decorate.ShowDecorate();
}