设计模式9：装饰模式【结构型】

#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();
}