中介者模式（C++）

#include <iostream>
#include <string>
using namespace std;

class absperson;
class absmed
{
public:
    absmed(){}
    virtual ~absmed(){}
    virtual void send(string,absperson*)=0;
    virtual void set(absperson*,absperson*)=0;
};

class absperson
{
public:
    absperson(){}
    virtual ~absperson(){}
    virtual void send(string)=0;
    virtual void get(string)=0;
protected:
    absmed *p_med;
};

class person_buy : public absperson
{
public:
    person_buy(absmed *p){p_med=p;}
    virtual ~person_buy(){}
    void send(string str)
    {
        p_med->send(str,this);
    }

    void get(string str)
    {
        cout<<"买主获得信息："<<str<<endl;
    }
};

class person_sell : public absperson
{
public:
    person_sell(absmed *p){p_med=p;}
    virtual ~person_sell(){}
    void send(string str)
    {
        p_med->send(str,this);
    }

    void get(string str)
    {
        cout<<"卖主获得信息："<<str<<endl;
    }
};

class med : public absmed
{
protected:
    absperson *person1;
    absperson *person2;
public:
    med(){}
    virtual ~med(){}
    void send(string str,absperson* p)
    {
        if (p==person1)
            person2->get(str);
        else
            person1->get(str);
    }

    void set(absperson *p1, absperson *p2)
    {
        person1=p1;
        person2=p2;
    }
};

int main()
{
    absmed *p_med=new med;
    absperson *p_buy=new person_buy(p_med);
    absperson *p_sell=new person_sell(p_med);

    p_med->set(p_buy,p_sell);
    p_buy->send("我想买电脑");
    p_sell->send("哥卖的不是电脑，是寂寞");
    p_buy->send("好吧，你赢了");
    
    delete p_med;
    delete p_buy;
    delete p_sell;

    system("pause");
    return 0;
}

转载于:https://www.cnblogs.com/tiandsp/archive/2012/06/28/2567628.html