UML—状态图

骑猪看日落 2022-07-14 07:20 199阅读 0赞

状态图如图：

![Center][]

代码：

#include<iostream>
    using namespace std;
    //定义状态变量，用不同整数表示不同状态
    const int OPENING = 1;
    const int OPEN = 2;
    const int CLOSING = 3;
    const int CLOSED = 4;
    class Motor
    {
    private:
        int s;
    public:
        void setS(int s1)
        {
            s=s1;
        }
        void getS()
        {
            switch(s)
            {
            case OPENING:
            {
                cout <<"motor up" << endl;
                break;
            }
            case OPEN:
            {
                cout << "motor off" << endl;
                break;
            }
            case CLOSING:
            {
                cout << "motor down" << endl;
                break;
            }
            case CLOSED:
            {
                cout << "motor off" << endl;
                break;
            }
            }
        }
    };
    class Door
    {
    public:
        Door():state(CLOSED) {};
        void getState()    // 根据当前状态输出相应的字符串
        {
            switch(state)
            {
            case OPENING:
            {
                motor.setS(state);
                motor.getS();
                cout <<"OPENING" << endl;
                break;
            }
            case OPEN:
            {
                motor.setS(state);
                motor.getS();
                cout << "OPEN" << endl;
                break;
            }
            case CLOSING:
            {
                motor.setS(state);
                motor.getS();
                cout << "CLOSING" << endl;
                break;
            }
            case CLOSED:
            {
                motor.setS(state);
                motor.getS();
                cout << "CLOSED" << endl;
                break;
            }
            }
        }
        void depress()       // 发生depress事件时进行状态转换
        {
            if (state == CLOSED||state == CLOSING)   setState(OPENING);
            else if (state == OPEN)   setState(CLOSING);
        }
        void doorOpen()     // 发生doorOpen事件时进行状态转换
        {
            if (state == OPENING)   setState(OPEN);
        }
        void doorClosed()    // 发生doorClosed事件时进行状态转换
        {
            if (state == CLOSING)   setState(CLOSED);
        }
    private:
        Motor motor;
        int state;                 // 传输门当前状态
        void setState(int state)   // 设置当前状态
        {
            this->state = state;
        }
    };
    int main()
    {
        Door aDoor;
        aDoor.getState();   // CLOSED
        aDoor.depress();
        aDoor.getState();   // OPENING
        aDoor.doorOpen();
        aDoor.getState();   // OPEN
        aDoor.depress();
        aDoor.getState();   // CLOSING
        aDoor.doorClosed();
        aDoor.getState();   // CLOSED
        return 0;
    }

运行结果：

![Center 1][]

[Center]: /images/20220714/c0d3dce29cab42b9b351b6566ea25f47.png
[Center 1]: /images/20220714/10fd764d63904b3ca462d1976e37430f.png