设计模式- 装饰模式

// 装饰模式：动态的给一个对象添加一些额外的职责，对于增加功能来说，装饰模式比生产子类更灵活;



// 人

class Person

{

public:
Person(void);
~Person(void);
Person(std::string name)
{
m_name = name;
}
virtual void Show()
{
cout<<"装扮的"<<m_name<<endl;
}

private:
string m_name;

};

// 装饰类;

class Finery : public Person

{

public:
Finery(void);
virtual~Finery(void);
void Decorate(Person *pPerson)
{
m_pPerson = pPerson;
}
void Show()
{
if (m_pPerson)
{
m_pPerson->Show();
}
}

private:
Person *m_pPerson;

};

class BigTrouser : public Finery

{

public:
BigTrouser(void);
~BigTrouser(void);
void Show()
{
cout<<"垮裤"<<endl;
Finery::Show();
}

};

class Sneakers : public Finery

{

public:
Sneakers(void);
~Sneakers(void);
void Show()
{
cout<<"破球鞋"<<endl;
Finery::Show();
}

};

class TShirts : public Finery

{

public:
TShirts(void);
~TShirts(void);
void Show()
{
cout<<"大T衣"<<endl;
Finery::Show();
}

};

#include "Sneakers.h"

#include "BigTrouser.h"

#include "TShirts.h"

// 装饰模式：动态的给一个对象添加一些额外的职责，对于增加功能来说，装饰模式比生产子类更灵活;

int _tmain(int argc, _TCHAR* argv[])

{
Person *pPerson = new Person("小菜");
Sneakers* pSneakers = new Sneakers;
BigTrouser* pBigTrouser = new BigTrouser;
TShirts* pTShirts = new TShirts;
pSneakers->Decorate(pPerson);
pBigTrouser->Decorate(pSneakers);
pTShirts->Decorate(pBigTrouser);
pTShirts->Show();
if (pPerson)
{
delete pPerson;
pPerson = NULL;
}
if (pSneakers)
{
delete pSneakers;
pSneakers = NULL;
}
if (pBigTrouser)
{
delete pBigTrouser;
pBigTrouser = NULL;
}
if (pTShirts)
{
delete pTShirts;
pTShirts = NULL;
}
return 0;

}