命令模式

 1 // 命令模式.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<list>
 7 using namespace std;
 8 
 9 //命令执行者
10 class Cooker
11 {
12 public:
13     Cooker(){}
14     ~Cooker(){}
15     void kaojirou()
16     {
17         cout<<"烤鸡肉"<<endl;
18     }
19     void kaoyangrou()
20     {
21         cout<<"烤羊肉"<<endl;
22     }
23 };
24 //抽象命令类
25 class Command
26 {
27 protected:
28     Cooker * cooker;
29 public:
30     Command(Cooker* c)
31     {
32         cooker=c;
33     }
34     virtual ~Command(){}
35     virtual void excute()=0;
36 };
37 //具体的命令1
38 class Command_kaojirou:public Command
39 {
40 public:
41     Command_kaojirou(Cooker* c):Command(c)
42     {}
43     virtual ~Command_kaojirou(){}
44     virtual void excute()
45     {
46         cooker->kaojirou();
47     }
48 };
49 //具体的命令2
50 class Command_kaoyangrou:public Command
51 {
52 public:
53     Command_kaoyangrou(Cooker* c):Command(c)
54     {}
55     virtual ~Command_kaoyangrou(){}
56     virtual void excute()
57     {
58         cooker->kaoyangrou();
59     }
60 };
61 //命令的通知者
62 class Waiter
63 {
64 private:
65     list<Command*> commands;
66 public:
67     Waiter(){}
68     ~Waiter(){}
69     //添加命令
70     void add_command(Command* c)
71     {
72         commands.push_back(c);
73     }
74     //通知命令
75     void notify()
76     {
77         list<Command*>::iterator it;
78         it=commands.begin();
79         for(;it!=commands.end();it++)
80         {
81             (*it)->excute();
82         }
83     }
84 };
85 int _tmain(int argc, _TCHAR* argv[])
86 {
87     Cooker *cook=new Cooker();
88     Command_kaojirou *kaorou=new Command_kaojirou(cook);
89     Waiter *waiter=new Waiter();
90     waiter->add_command(kaorou);
91     waiter->notify();
92     return 0;
93 }