实时控制软件第二次作业--停车场门禁控制系统状态机

作者：李君威U201310747

状态机图示：

将起落杆的位置状态和通行灯信号作为两个类对象，汽车出入闸传感器信号作为输入，编写代码：

 1 // qichemenjin.cpp
 2 //Copy right by Justin.
 3
 4 #include "stdafx.h"
 5 #include <iostream>
 6 using namespace std;
 7 class Liftlever
 8 {
 9 public:
10     bool Leverstate;  //起落杆位置
11     void Changeleverstate()
12     {
13         Leverstate = !Leverstate;
14     };
15 };
16
17 class Light
18 {
19 public:
20     bool Lightstate;  //通行灯信号
21     void Changelightstate()
22     {
23         Lightstate = !Lightstate;
24     };
25 };
26
27 void showleverstate(bool state)
28 {
29     if(state==true)
30         cout << "起落杆升起" << endl;
31     else
32         cout << "起落杆落下" << endl;
33 };
34
35 void showlightstate(bool state)
36 {
37     if (state == true)
38         cout << "绿灯亮" << endl;
39     else
40         cout << "红灯亮" << endl;
41 };
42
43 Liftlever Liftleverdemo;
44 Light Lightdemo;
45
46 bool Controlsystem(char car)
47 {
48     switch (car)
49     {
50     case ‘y‘:
51         Liftleverdemo.Changeleverstate();
52         break;
53     case ‘n‘:
54         break;
55     };
56
57     showleverstate(Liftleverdemo.Leverstate);
58
59     switch (Liftleverdemo.Leverstate)
60     {
61     case true:
62         Lightdemo.Lightstate = true;
63         cout << "绿灯亮" << endl;
64         break;
65     case false:
66         Lightdemo.Lightstate = false;
67         cout << "红灯亮" << endl<<endl;
68         break;
69     };
70     return Lightdemo.Lightstate;
71 };
72
73
74 int main()
75 {
76     char carin;
77     char carout;
78     while (1)
79     {
80         cout << "是否有车辆进入？（y/n）" << endl;
81         cin >> carin;
82         bool nextstep = Controlsystem(carin);
83         while (nextstep)
84         {
85             cout << "车辆是否已经驶出？（y/n）" << endl;
86             cin >> carout;
87             nextstep = Controlsystem(carout);
88         };
89     };
90     return 0;
91 }

运行结果：