Mediator

最新推荐文章于 2019-03-23 09:30:01 发布

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本文通过一个C++程序示例介绍了中介者模式的基本概念和实现方式。该程序展示了两个子类如何通过一个中介者类进行交互，实现了消息传递的功能。

#include <cstdlib>
#include <iostream>
#include <string>
using namespace std;
class g
{
public:
virtual ~g(){cout<<"g 基类析构"<<endl;}
virtual string Say(string str) = 0;
virtual void Listen(string str) = 0;
};
class wch:public g
{
public:
virtual ~wch(){cout<<"wch 子类析构"<<endl;}
virtual string Say(string str){
    return str;
}
virtual void Listen(string str){
    cout<<"I heard tzh said:"<<str<<".I am very happy!"<<endl;
}
};
class tzh:public g
{
public:
virtual ~tzh(){cout<<"tzh 子类析构"<<endl;}
virtual string Say(string str){
    return str;
}
virtual void Listen(string str){
    cout<<"I heard wch said:"<<str<<".I am very happy!"<<endl;
}
};
class Mediator
{
public:
virtual ~Mediator(){cout<<"Mediator 基类析构"<<endl;}
virtual void wchSayTotzh(string str) = 0;
virtual void tzhSayTowch(string str) = 0;
};
class gMediator:public Mediator
{
g* pWch;
g* pTzh;
public:
virtual ~gMediator(){
    cout<<"gMediator 子类析构"<<endl;
    delete pWch;
    delete pTzh;
}
gMediator(){
    pWch = new wch;
    pTzh = new tzh;
}
void wchSayTotzh(string str){
    pTzh->Listen(pWch->Say(str) + ":sister");
}
void tzhSayTowch(string str){
    pWch->Listen(pTzh->Say(str) + ":sister");
}
};
void Do(Mediator* pM)
{
pM->wchSayTotzh(string("let's wash together?"));
pM->tzhSayTowch(string("wawo ok"));
delete pM;
}
int main(int argc, char *argv[])
{
    Do(new gMediator);
    system("PAUSE");
    return EXIT_SUCCESS;
}