其状态机如下图:

#include<iostream>
using namespace std;
void main()
{
char enter_or_out; //1表示入闸传感器ture，0表示出闸传感器ture
int up_or_downt = 0; //1表示起落杆升起，0表示起落杆落下

cout << "状态初始化..." << ‘\n‘;
cout << "当前状态为起落杆落下，红灯状态，禁止通行" << ‘\n‘;

while (1)
{
cout << "检测是否有车进入或离开门禁系统y or n" << ‘\n‘;
cin >> enter_or_out;

if (enter_or_out == ‘y‘)
{
cout << "入闸传感器ture，有车驶入" << ‘\n‘;
up_or_downt = 1;
cout << "起落杆升起" <<‘\n‘;
cout << "通行灯为绿灯，汽车可通行" << ‘\n‘;
}

if (enter_or_out == ‘n‘)
{
cout << "出闸传感器ture，汽车驶出门禁系统" << ‘\n‘;
up_or_downt = 0;
cout << "起落杆落下" << ‘\n‘;
cout << "通行灯为红灯，汽车禁止通行" << ‘\n‘;
}

}
}

停车场门禁控制系统的状态机