【设计模式】状态模式

 

这一篇只有代码

 

// State.cpp : 定义控制台应用程序的入口点。 //  #include "stdafx.h" #include <iostream>
using namespace std; //强制声明
class CMe; //状态抽象基类
class CState { public: CState(); virtual ~CState(); virtual void Show(CMe* pMe) = 0; }; CState::CState(){} CState::~CState(){} //单身状态类
class CSingle : public CState { public: CSingle(); virtual ~CSingle(); virtual void Show(CMe* pMe); }; CSingle::CSingle(){} CSingle::~CSingle(){} void CSingle::Show(CMe* pMe) { cout << endl << "哥哥是单身狗啊单身狗！！！" << endl; } //有女朋友状态类
class CWithGirl : public CState { public: CWithGirl(); virtual ~CWithGirl(); virtual void Show(CMe* pMe) ; }; CWithGirl::CWithGirl(){} CWithGirl::~CWithGirl(){} void CWithGirl::Show(CMe* pMe) { cout << endl << "哥哥有女朋友了啊好幸福！！！" << endl; } //我 类
class CMe { public: CMe(); virtual ~CMe(); void SetState(CState* pState);  //设置状态
    void ShowMsg();                    //显示此状态的信息

protected: CState* m_ptrState; }; CMe::CMe() : m_ptrState(NULL){} CMe::~CMe(){} void CMe::SetState(CState* pState) { m_ptrState = pState; } void CMe::ShowMsg() { m_ptrState->Show(this); } int _tmain(int argc, _TCHAR* argv[]) { CMe me1; me1.SetState(new CSingle()); me1.ShowMsg(); cout << endl << endl; me1.SetState(new CWithGirl()); me1.ShowMsg(); cout << endl << endl; return 0; }

 

 

执行结果

 

 

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