【1】什么是责任链模式？
责任链模式：
【2】责任链模式的代码示例：
代码示例：
1 #include<iostream>
2 #include<string>
3 using namespace std;
4
5 class Request
6 {
7 public:
8 string requestType;
9 string requestContent;
10 int number;
11 };
12
13 class Manager
14 {
15 protected:
16 string name;
17 Manager *superior;
18 public:
19 Manager(string name)
20 {
21 this->name = name;
22 }
23 void setSuperior(Manager *superior)
24 {
25 this->superior = superior;
26 }
27 virtual void requestApplications(Request *request) = 0;
28 };
29
30 class CommonManager : public Manager
31 {
32 public:
33 CommonManager(string name) : Manager(name)
34 {}
35 void requestApplications(Request *request)
36 {
37 if (request->requestType == "请假" && request->number <= 2)
38 {
39 cout << name << " " << request->requestContent << " 请假天数: " << request->number << " 被批准" << endl;
40 }
41 else
42 {
43 if (superior != NULL)
44 {
45 superior->requestApplications(request);
46 }
47 }
48 }
49 };
50
51 class Majordomo : public Manager
52 {
53 public:
54 Majordomo(string name) : Manager(name)
55 {}
56 void requestApplications(Request *request)
57 {
58 if (request->requestType == "请假" && request->number <= 5)
59 {
60 cout << name << " " << request->requestContent << " 请假天数: " << request->number << " 被批准" << endl;
61 }
62 else
63 {
64 if (superior != NULL)
65 {
66 superior->requestApplications(request);
67 }
68 }
69 }
70 };
71
72
73 class GeneralManager : public Manager
74 {
75 public:
76 GeneralManager(string name) : Manager(name)
77 {}
78 void requestApplications(Request *request)
79 {
80 if (request->requestType == "请假")
81 {
82 cout << name << " " << request->requestContent << " 请假天数: " << request->number << " 被批准" << endl;
83 }
84 }
85 };
86
87 int main()
88 {
89 CommonManager *jingli = new CommonManager("经理");
90 Majordomo *zongjian = new Majordomo("总监");
91 GeneralManager *zongjingli = new GeneralManager("总经理");
92
93 jingli->setSuperior(zongjian);
94 zongjian->setSuperior(zongjingli);
95
96 Request *request = new Request();
97
98 request->requestType = "请假";
99 request->requestContent = "李俊宏请假";
100 request->number = 1;
101 jingli->requestApplications(request);
102
103 request->requestType = "请假";
104 request->requestContent = "李俊宏请假";
105 request->number = 4;
106 jingli->requestApplications(request);
107
108 request->requestType = "请假";
109 request->requestContent = "李俊宏请假";
110 request->number = 10;
111 jingli->requestApplications(request);
112
113 return 0;
114 }
115 //Result:
116 /*
117 经理 李俊宏请假 请假天数: 1 被批准
118 总监 李俊宏请假 请假天数: 4 被批准
119 总经理 李俊宏请假 请假天数: 10 被批准
120 */
Good Good Study， Day Day Up.
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