c++中介者模式

最新推荐文章于 2025-06-30 11:08:01 发布

原创最新推荐文章于 2025-06-30 11:08:01 发布 · 423 阅读

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本文探讨了软件设计中的面向对象原则与架构模式，详细解释了如何使用类、对象、继承和多态来构建模块化的系统，同时展示了如何通过中介者模式实现组件之间的高效通信与协作。

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#include "stdafx.h"
#include <iostream>
#include <string>
using namespace std;

typedef string State;

class Colleague;

class Mediator
{
public:
	virtual void AToB() = 0;
	virtual void BToA() = 0;
	virtual void IntroColleague(Colleague* pColleagueA, Colleague* pColleagueB) = 0;
	virtual ~Mediator() {}
};

class Colleague
{
protected:
	Mediator* m_pMediator;
public:
	Colleague() {}
	Colleague(Mediator* pMediator):m_pMediator(pMediator){}
	virtual void Action() = 0;
	virtual void SetDate(const State& sta) = 0;
	virtual State GetDate() const = 0;
	virtual void PrintDate() = 0;
};

class ConcreteColleagueA:public Colleague
{
public:
	ConcreteColleagueA() {}
	ConcreteColleagueA(Mediator* pMediator):Colleague(pMediator) {}
	void SetDate(const State& sta) {m_date = sta;}
	State GetDate() const {return m_date;}

	void Action()
	{
		m_pMediator->AToB();
	}
	void PrintDate() {cout<<m_date<<endl;}
private:
	State m_date;
};

class ConcreteColleagueB:public Colleague
{
public:
	ConcreteColleagueB() {}
	ConcreteColleagueB(Mediator* pMediator):Colleague(pMediator) {}
	void SetDate(const State& sta) {m_date = sta;}
	State GetDate() const {return m_date;}
	void Action()
	{
		m_pMediator->BToA();
	}
	void PrintDate() {cout<<m_date<<endl;}
private:
	State m_date;
};

class ConcreteMediator:public Mediator
{
public:
	void AToB() {m_pColleagueB->SetDate(m_pColleagueA->GetDate());}
	void BToA() {m_pColleagueA->SetDate(m_pColleagueB->GetDate());}
	void IntroColleague(Colleague* pColleagueA, Colleague* pColleagueB)
	{
		m_pColleagueA = pColleagueA;
		m_pColleagueB = pColleagueB;
	}
private:
	Colleague* m_pColleagueA;
	Colleague* m_pColleagueB;
};

int _tmain(int argc, _TCHAR* argv[])
{
	Mediator* pMediator = new ConcreteMediator;
	Colleague* pColleagueA = new ConcreteColleagueA(pMediator);
	Colleague* pColleagueB = new ConcreteColleagueB(pMediator);
	pMediator->IntroColleague(pColleagueA, pColleagueB);
	pColleagueA->SetDate("this is A");
	pColleagueB->SetDate("this is B");
	pColleagueA->PrintDate();
	pColleagueB->PrintDate();
	pColleagueA->Action();
	//after A's change, B is also changed;

	pColleagueB->PrintDate();
	getchar();
	return 0;
}