c#程序题，急

Question

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Timers;namespace L6_4
{
    class Program
    {
        static void Main(string[] args)
        {
             
            Cross cross1 = new Cross();
            Car car1 = new Car((Postion)0,( Postion)2, cross1);
            Car car2 = new Car((Postion)1, (Postion)3, cross1);
            Console.WriteLine("车的ID号是:"+car1.CarID +"车要前往的方向："+ car1.ToPos+"汽车是否通过："+car1.isPassed);
            Console.WriteLine("车的ID号是:"+car2.CarID + "车要前往的方向："+ car2.ToPos);
        }
        public class Cross
        {
            private bool light1;
            private bool light2=false ;
            private bool light3;
            private bool light4=false;            public bool Light1 { get; set; }
            public bool Light2 { get; set; }
            public bool Light3 { get; set; }
            public bool Light4 { get; set; }
            public event EventHandler OnShiftLight;
            public void time()
            {
                System.Timers.Timer aTimer = new System.Timers.Timer();
                aTimer.Elapsed += new ElapsedEventHandler(TimeEvent);
                // 设置引发时间的时间间隔　此处设置为１秒（１０００毫秒） 
                aTimer.Interval = 30000;
                aTimer.Enabled = true;
            }
            private void TimeEvent(object source, ElapsedEventArgs e)
            {
                if (light1 && light3)
                {
                    light1 = false;
                    light3 = false;
                }
                else if (light2 && light4)
                {
                    light2 = false;
                    light4 = false;
                }
                else if (!light1 && !light3)
                {
                    light2 = true;
                    light4 = true;
                }
                else if (!light2 && !light4)
                {
                    light2 = true;
                    light4 = true;
                }
            }
        }
        public class Car
        {
            private static int count = 0; // CarID
            public int CarID { get; private set; }
            public Postion Pos { get; set; }    // 当前的位置
            public Postion ToPos { get; set; }  // 要驶向的方位 
            public State CurState { get; set; } // 当前的状态
            private Cross cross;
            public bool isPassed { get; private set; }            public Car(Postion from, Postion to, Cross cross)
            {
                count++;
                CarID = count;                CurState = State.Stop; //初始为停止
                isPassed = false;                Pos = from;
                ToPos = to;
                this.cross = cross;                if (cross != null)
                    cross.OnShiftLight += new EventHandler(Run);
            }            public void Run(object sender, EventArgs e) // 根据十字路口路灯状态指示决定是否启动
            {
                if ((cross.Light1 && ToPos == Postion.East)
                    || (cross.Light2 && ToPos == Postion.South)
                    || (cross.Light3 && ToPos == Postion.West)
                    || (cross.Light4 && ToPos == Postion.North))
                {
                    CurState = State.Running;
                    Pos = ToPos;
                    isPassed = true;
                }
            }
        }        public enum State
        {
            Running,
            Stop,
        }        public enum Postion
        {
            East,
            South,
            West,
            North
        }
    }
}谁能帮我看看怎么才能触发事件OnShiftLight？这个是模拟红绿灯十字路口

Answer 1

  public bool Light1 { get; set; }
  public bool Light2 { get; set; }
  public bool Light3 { get; set; }
  public bool Light4 { get; set; }在Cross的灯set的时候
if(this.OnShiftLight!=null)
{
this.OnShiftLight(....);
}

Answer 2

    class Program2
    {
        static void Main(string[] args)
        {            Cross cross1 = new Cross();
            cross1.OnShiftLight += new EventHandler(cross1_OnShiftLight);
            Car car1 = new Car((Postion)0, (Postion)2, cross1);
            Car car2 = new Car((Postion)1, (Postion)3, cross1);            cross1.CarList.Add(car1);
            cross1.CarList.Add(car2);
            while (true)
            {
                Console.WriteLine("车的ID号是:" + car1.CarID + "车要前往的方向：" + car1.ToPos + "汽车是否通过：" + car1.isPassed);
                Console.WriteLine("车的ID号是:" + car2.CarID + "车要前往的方向：" + car2.ToPos + "汽车是否通过：" + car2.isPassed);
                System.Threading.Thread.Sleep(3000);
            }
        }        static void cross1_OnShiftLight(object sender, EventArgs e)
        {
            foreach (Car item in ((Cross)sender).CarList)
            {
                item.Run();
            }
        }        public class Cross
        {
            public bool Light1 { get; set; }
            public bool Light2 { get; set; }
            public bool Light3 { get; set; }
            public bool Light4 { get; set; }
            public List<Car> CarList { get; set; }
            public event EventHandler OnShiftLight;            public Cross()
            {
                CarList = new List<Car>();
                System.Timers.Timer aTimer = new System.Timers.Timer();
                // 设置引发时间的时间间隔　此处设置为１秒（１０００毫秒）  
                aTimer.Elapsed += new ElapsedEventHandler(TimeEvent);
                aTimer.Interval = 3000;
                aTimer.Enabled = true;
                aTimer.Start();
            }            private void TimeEvent(object source, ElapsedEventArgs e)
            {
                Light1 = !Light1;
                Light2 = !Light2;
                Light3 = !Light3;
                Light4 = !Light4;
                //if (light1 && light3)
                //{
                //    light1 = false;
                //    light3 = false;
                //}
                //else if (light2 && light4)
                //{
                //    light2 = false;
                //    light4 = false;
                //}
                //else if (!light1 && !light3)
                //{
                //    light2 = true;
                //    light4 = true;
                //}
                //else if (!light2 && !light4)
                //{
                //    light2 = true;
                //    light4 = true;
                //}
                if (OnShiftLight != null)
                {
                    EventArgs ea = new EventArgs();
                    OnShiftLight(this, ea);
                }
            }
        }
        public class Car
        {
            private static int count = 0; // CarID
            public int CarID { get; private set; }
            public Postion Pos { get; set; } // 当前的位置
            public Postion ToPos { get; set; } // 要驶向的方位  
            public State CurState { get; set; } // 当前的状态
            private Cross cross;
            public bool isPassed { get; private set; }            public Car(Postion from, Postion to, Cross cross)
            {
                count++;
                CarID = count;                CurState = State.Stop; //初始为停止
                isPassed = false;                Pos = from;
                ToPos = to;
                this.cross = cross;
            }            public void Run() // 根据十字路口路灯状态指示决定是否启动
            {
                if ((cross.Light1 && ToPos == Postion.East)
                || (cross.Light2 && ToPos == Postion.South)
                || (cross.Light3 && ToPos == Postion.West)
                || (cross.Light4 && ToPos == Postion.North))
                {
                    CurState = State.Running;
                    Pos = ToPos;
                    isPassed = true;
                }
                else
                {
                    CurState = State.Stop;
                    Pos = ToPos;
                    isPassed = false;
                }
            }
        }        public enum State
        {
            Running,
            Stop,
        }        public enum Postion
        {
            East,
            South,
            West,
            North
        }
    }
大概给你改了一下，代码逻辑自己再理清一点。