[设计模式] 设计模式课程（二十）--命令模式

 1 #include <iostream>
 2 #include <vector>
 3 #include <string>
 4 using namespace std;
 5 
 6 class Command
 7 {
 8 public:
 9     virtual void execute() = 0;
10 };
11 
12 class ConcreteCommand1 : public Command
13 {
14     string arg;
15 public:
16     ConcreteCommand1(const string & a) : arg(a) {}
17     void execute() override
18     {
19         cout<< "#1 process..."<<arg<<endl;
20     }
21 };
22 
23 class ConcreteCommand2 : public Command
24 {
25     string arg;
26 public:
27     ConcreteCommand2(const string & a) : arg(a) {}
28     void execute() override
29     {
30         cout<< "#2 process..."<<arg<<endl;
31     }
32 };
33         
34 class MacroCommand : public Command
35 {
36     vector<Command*> commands;
37 public:
38     void addCommand(Command *c) { commands.push_back(c); }
39     void execute() override
40     {
41         for (auto &c : commands)
42         {
43             c->execute();
44         }
45     }
46 };
47         
48 int main()
49 {
50 
51     ConcreteCommand1 command1(receiver, "Arg ###");
52     ConcreteCommand2 command2(receiver, "Arg $$$");
53     
54     MacroCommand macro;
55     macro.addCommand(&command1);
56     macro.addCommand(&command2);
57     
58     macro.execute();
59 
60 }