最初版本
#include <iostream>
class Message
{
public:
virtual void Login(std::string username, std::string password) = 0;
virtual void SendMessage(std::string messages) = 0;
virtual void SendPicture(Image image) = 0;
virtual void PalySound() = 0;
virtual void DrawShape() = 0;
virtual void WirteText() = 0;
virtual void Connect() = 0;
virtual ~Message() {};
};
class PCMessageBase : public Message
{
public:
virtual void PalySound()
{
}
virtual void DrawShape()
{
}
virtual void WirteText()
{
}
virtual void Connect()
{
}
};
class MobileMessageBase : public Message
{
public:
virtual void PalySound()
{
}
virtual void DrawShape()
{
}
virtual void WirteText()
{
}
virtual void Connect()
{
}
};
class PCMessagePerfect : public PCMessageBase
{
public:
virtual void Login(std::string username, std::string password)
{
PCMessageBase::PalySound();
/*******/
PCMessageBase::Connect();
}
virtual void SendMessage (std::string message)
{
PCMessageBase::PalySound();
/*******/
PCMessageBase::WirteText();
}
virtual void SendPicture(Image image)
{
PCMessageBase::PalySound();
/*******/
PCMessageBase::DrawShape();
}
};
class PCMessageLite : public PCMessageBase
{
public:
virtual void Login(std::string username, std::string password)
{
PCMessageBase::Connect();
}
virtual void SendMessage (std::string message)
{
PCMessageBase::WirteText();
}
virtual void SendPicture(Image image)
{
PCMessageBase::DrawShape();
}
};
class MobileMessagePerfect : public MobileMessageBase
{
public:
virtual void Login(std::string username, std::string password)
{
MobileMessageBase::PalySound();
/*******/
MobileMessageBase::Connect();
}
virtual void SendMessage (std::string message)
{
MobileMessageBase::PalySound();
/*******/
MobileMessageBase::WirteText();
}
virtual void SendPicture(Image image)
{
MobileMessageBase::PalySound();
/*******/
MobileMessageBase::DrawShape();
}
};
class MobileMessageList : public MobileMessageBase
{
public:
virtual void Login(std::string username, std::string password)
{
MobileMessageBase::Connect();
}
virtual void SendMessage (std::string message)
{
MobileMessageBase::WirteText();
}
virtual void SendPicture(Image image)
{
MobileMessageBase::DrawShape();
}
};
int main()
{
Message * msg = new PCMessagePerfect();
}最终版本
#include <iostream>
class Image
{
};
class MessageImp;
class Message
{
protected:
MessageImp* messageImp;
public:
Message(MessageImp* messageImp) : messageImp(messageImp) {}
virtual void Login(std::string username, std::string password) = 0;
virtual void SendMessage(std::string messages) = 0;
virtual void SendPicture(Image image) = 0;
virtual ~Message() {};
};
class MessageImp
{
public:
virtual void PalySound() = 0;
virtual void DrawShape() = 0;
virtual void WirteText() = 0;
virtual void Connect() = 0;
virtual ~MessageImp() {};
};
class PCMessageImp : public MessageImp
{
public:
virtual void PalySound()
{
}
virtual void DrawShape()
{
}
virtual void WirteText()
{
}
virtual void Connect()
{
}
};
class MobileMessageImp : public MessageImp
{
public:
virtual void PalySound()
{
}
virtual void DrawShape()
{
}
virtual void WirteText()
{
}
virtual void Connect()
{
}
};
class MessagePerfect : public Message
{
public:
MessagePerfect(MessageImp* messageImp):Message(messageImp)
{
}
virtual void Login(std::string username, std::string password)
{
messageImp->PalySound();
/*******/
messageImp->Connect();
}
virtual void SendMessage(std::string message)
{
messageImp->PalySound();
/*******/
messageImp->WirteText();
}
virtual void SendPicture(Image image)
{
messageImp->PalySound();
/*******/
messageImp->DrawShape();
}
};
class MessageLite :public Message
{
public:
MessageLite(MessageImp* messageImp) :Message(messageImp)
{
}
virtual void Login(std::string username, std::string password)
{
messageImp->Connect();
}
virtual void SendMessage(std::string message)
{
messageImp->WirteText();
}
virtual void SendPicture(Image image)
{
messageImp->DrawShape();
}
};
int main()
{
MessageImp* imp = new MobileMessageImp();
Message* mge = new MessagePerfect(imp);
}
