简单工厂模式 与 抽象工厂模式

//////////////////////////////////////////////////////////////////////////简单工厂模式
class CDisplayer
{
public:
virtual void Play() = 0;
};

class CVCDDisplayer : public CDisplayer
{
public:
void Play(){ cout<<"vcd displayer"<<endl; }
};

class CDVDDisplayer : public CDisplayer
{
public:
void Play(){ cout<<"dvd displayer"<<endl; }
};

class IFactory
{
public:
static CDisplayer* CreateDisplayer(char szName)
{
switch ( szName )
{
case 'v':
{
return new CVCDDisplayer();
}
break;
case 'd':
{
return new CDVDDisplayer();
}
break;
default:break;
}

return NULL;
}
};

int _tmain(int argc, _TCHAR* argv[])
{
CDisplayer* pDisplayer = IFactory::CreateDisplayer('v');
pDisplayer->Play();
delete pDisplayer;
}

//////////////////////////////////////////////////////////////////////////抽象工厂模式

class IUser
{
public:
virtual void fun() = 0;
};

class SqlUser : public IUser
{
public:
void fun(){cout<<"Sql USER"<<endl;}
};

class AcessUser : public IUser
{
public:
void fun(){cout<<"access USER"<<endl;}
};

class IFactroy2
{
public:
virtual IUser* createUser() = 0;
};

class SQLFactroy : public IFactroy2
{
public:
IUser* createUser() { return new SqlUser; }
};

class AcessFactroy : public IFactroy2
{
public:
IUser* createUser(){return new AcessUser;}
};

int _tmain(int argc, _TCHAR* argv[])
{
IFactroy2* pFactory = new SQLFactroy();
IUser* pUser = pFactory->createUser();
pUser->fun();

delete pUser;
delete pFactory;
}