c20-中介者模式例.txt

C++课件,很好用的,帮助大家学习C++.

//中介者

//原始设计
//.h文件
class Wife;
class Husband
{
public:
	Husband(int nage):age(nage) {}
	int Age() const {return age;}
	void SetWife(Wife * wife) {w=wife;}
	int GetWifeAge() const;
private:
	int age;
	Wife *  w;
};
class Wife
{
public:
	Wife(int nage):age(nage) {}
	int Age() const {return age;}
	void SetHusband(Husband * husband){h=husband;}
	int GetHusbandAge() const;
private:
	int      age;
	Husband * h;
};
//.cpp文件
int Husband::GetWifeAge() const {return w->Age();}
int Wife::GetHusbandAge() const {return h->Age();}

void main()
{
	//创建对象
	Husband  h(30);
        Wife     w(28);     
        h.SetWife(&w);
        w.SetHusband(&h);
       
        //应用
        cout<<h.GetWifeAge()<<endl;
        cout<<w.GetHusbandAge()<<endl;    	
}
//-------------------------------------------------------------------------
//采用中介者模式
//.h文件
class Couple;
class Husband
{
public:
	Husband(int nage):age(nage) {}
	int Age() const {return age;}
	//void (Wife * wife) {w=wife;}
                void SetCouple(Couple * p){couple=p;}
	int GetWifeAge() const;// {return couple->GetWifeAge();}
private:
	int age;
	Couple * couple;
};
class Wife
{
public:
	Wife(int nage):age(nage) {}
	int Age() const {return age;}
	//void SetHusband(Husband * husband){h=husband;}
                 void SetCouple(Couple * p){couple=p;}
	int GetHusbandAge() const;
private:
    int age;
    Couple * couple;
};
class Couple
{
public:
    Couple(Husband * husband,Wife * wife)
        :h(husband),w(wife)   {husband->SetCouple(this);wife->SetCouple(this);}
    int GetHusbandAge() const {return h->Age();}
    int GetWifeAge() const    {return w->Age();}
private:
    Husband * h;
    Wife    * w;
};


//.cpp文件
int Husband::GetWifeAge() const {return couple->GetWifeAge();}
int Wife::GetHusbandAge() const {return couple->GetHusbandAge();}
void main()
{   
    Husband  h(30);
    Wife     w(28);
    Couple   couple(&h,&w);

    //应用
    cout<<h.GetWifeAge()<<endl;
    cout<<w.GetHusbandAge()<<endl;
}