访问者模式

  1 // 访问者模式.cpp : 定义控制台应用程序的入口点。
  2 //
  3 
  4 #include "stdafx.h"
  5 #include<iostream>
  6 #include<string>
  7 #include<list>
  8 using namespace std;
  9 //被访问者类声明
 10 class Person;
 11 //访问者类声明
 12 class Visiter ;
 13 //public:
 14     //virtual void print_sproter(Person *)=0;
 15     //virtual void print_judgement(Person *)=0;
 16 
 17 //被访问者抽象类
 18 class Person
 19 {
 20 public:
 21     Person(){}
 22     virtual ~Person(){}
 23     virtual string getname()=0;
 24     virtual string getNo()=0;
 25     virtual void accept(Visiter *)=0;
 26 };
 27 //访问者抽象类
 28 class Visiter 
 29 {
 30 public:
 31     Visiter(){}
 32     virtual ~Visiter(){}
 33     virtual void print_sproter(Person *)=0;
 34     virtual void print_judgement(Person *)=0;
 35 };
 36 //具体的被访问者1
 37 class Sporter  :public Person
 38 {
 39 private:
 40     string name;//姓名
 41     string No;  //编号
 42 public:
 43     Sporter(string n,string N)
 44     {
 45         name=n;
 46         No=N;
 47     }
 48     virtual~Sporter(){}
 49     virtual void accept(Visiter *visiter)
 50     {
 51         visiter->print_sproter(this);
 52     }
 53     virtual string getname()
 54     {
 55         return name;
 56     }
 57     virtual string getNo()
 58     {
 59         return No;
 60     }
 61 };
 62 //具体的被访问者2
 63 class Judgement  :public Person
 64 {
 65 private:
 66     string name;//姓名
 67 public:
 68     Judgement(string n)
 69     {
 70         name=n;
 71     }
 72     virtual~Judgement(){}
 73     virtual void accept(Visiter *visiter)
 74     {
 75         visiter->print_judgement(this);
 76     }
 77     virtual string getname()
 78     {
 79         return name;
 80     }
 81     virtual string getNo()
 82     {
 83         return 0;
 84     }
 85 };
 86 
 87 //具体的访问者类
 88 class Concretevisitor:public Visiter
 89 {
 90 public:
 91     Concretevisitor(){}
 92     virtual ~Concretevisitor(){}
 93     virtual void print_sproter(Person *people)
 94     {
 95         cout<<"运动员"<<endl;
 96         cout<<"name:"<<people->getname()<<endl;
 97         cout<<"No:"<<people->getNo()<<endl;
 98     }
 99     virtual void print_judgement(Person *people)
100     {
101         cout<<"裁判"<<endl;
102         cout<<"name:"<<people->getname()<<endl;
103     }
104 };
105 
106 //被访问者的具体对象结构
107 class Objectstructure
108 {
109 private:
110     list<Person*> persons;
111 public:
112     Objectstructure(){}
113     ~Objectstructure(){}
114     void add(Person* people)
115     {
116         persons.push_back(people);
117     }
118     void remove(Person* people)
119     {
120         persons.remove(people);
121     }
122     void accept(Visiter* visiter)
123     {
124         list<Person*>::iterator it=persons.begin();
125         for(;it!=persons.end();it++)
126         {
127             (*it)->accept(visiter);
128         }
129     }
130 };
131 
132 int _tmain(int argc, _TCHAR* argv[])
133 {
134     Objectstructure* yundonghui=new Objectstructure();//新建一个运动会的对象结构
135     Sporter * zhangsan=new Sporter("张三","0001");
136     Sporter * lisi=new Sporter("李四","0002");
137     Sporter * wangwu=new Sporter("王五","0003");
138     Judgement* liu=new Judgement("刘裁判");
139     yundonghui->add(zhangsan);
140     yundonghui->add(lisi);
141     yundonghui->add(wangwu);
142     yundonghui->add(liu);
143 
144     Concretevisitor *notify=new Concretevisitor();
145 
146     cout<<"比赛即将开始，请下列运动员和裁判到检录台检录："<<endl;
147     yundonghui->accept(notify);
148     return 0;
149 }