Question

我正在尝试构建一个包含三个主要事件的流量模拟器：

轻微改变
一辆车进入十字路口
一辆离开十字路口的汽车

程序应根据用户输入输出事件组合......但由于某种原因，它无法正常工作。输出会反复喷出一个事件（例如，到达事件），或者只有两个事件，而不是根据用户输入的几个事件的组合，如此;

arriveeast
arriveeast
arrivenorth
lighteast

我想知道是否有人会如此善意地指出我忽略的是什么？我对此比较陌生，而且我很难找到人们反省的想法。我认为循环失败，但我不知道如何/在哪里，我没有得到错误消息......

using System;
using System.Collections;

namespace sim
{
    public static class Simulation
    {
        public static void Main()
        {
            double average; // average of all trials
            double interArrivalEast, interArrivalNorth; // Arrival times between cars coming from East and North
            double onTimeEast, onTimeNorth, onTimeBoth; // Green light on times for East and North lights as well as both lights
            double lastLeaveEast, lastLeaveNorth; // Last time a car left from the East and North
            double totalTime; // Total time for all events to occur
            double sum = 0;
            double u; // Uniformly distributed random variable
            int numEvents; // Total number of events possible
            Event temp = new Event("", 0);
            Random rand1; // Random seed
            PriorityQueue<Event> events; // Priority queue of events
            Queue east, north; // Queue of cars approaching from the East and North
            bool eastLight, northLight;
            east = new Queue();
            north = new Queue();
            rand1 = new Random();
            Console.Write("Please enter the inter-arrival time for cars approaching from the East: ");
            interArrivalEast = -(Convert.ToDouble(Console.ReadLine()) * Math.Log(u = rand1.NextDouble()));
            Console.Write("Please enter the inter-arrival time for cars approaching from the North: ");
            interArrivalNorth = -(Convert.ToDouble(Console.ReadLine()) * Math.Log(u));
            Console.Write("Please enter the green light on time for cars approaching from the East: ");
            onTimeEast = Convert.ToDouble(Console.ReadLine());
            Console.Write("Please enter the green light on time for cars approaching from the North: ");
            onTimeNorth = Convert.ToDouble(Console.ReadLine());
            onTimeBoth = onTimeEast + onTimeNorth;
            numEvents = Convert.ToInt32((interArrivalEast * 50 / onTimeEast) + (interArrivalNorth * 50 / onTimeNorth) + (onTimeEast * 50 / 3) + (onTimeNorth * 50 / 3) + 100);
            events = new PriorityQueue<Event>(numEvents);
            totalTime = ((50 * onTimeEast) + (50 * onTimeNorth));

            for (double i = 0; i < totalTime; i += interArrivalEast)
            {
                events.Add(new Event("arriveeast", i));
            }
            for (double j = 0; j < totalTime; j += interArrivalNorth)
            {
                events.Add(new Event("arrivenorth", j));
            }
            for (double k = 0; k < totalTime; k += onTimeBoth)
            {
                events.Add(new Event("lighteast", k));
                for (double l = k; l < k + onTimeBoth; l += 3)
                    events.Add(new Event("leaveeast", l));
            }
            for (double m = onTimeEast; m < totalTime; m += onTimeBoth)
            {
                events.Add(new Event("lightnorth", m));
                for (double n = m; n < m + onTimeBoth; n += 3)
                    events.Add(new Event("leavenorth", n));
            }
            for (int o = 0; o < 1000; o++)
            {
                while (!events.Empty())
                {
                    temp = events.Front();
                    switch (temp.EType)
                    {

                        case "arriveeast":
                            east.Enqueue(temp.Time);
                            break;
                        case "arrivenorth":
                            north.Enqueue(temp.Time);
                            break;
                        case "leaveeast":
                            east.Dequeue();
                            break;
                        case "leavenorth":
                            north.Dequeue();
                            break;
                        case "lighteast":
                            eastLight = true;
                            northLight = false;
                            break;
                        case "lightnorth":
                            northLight = true;
                            eastLight = false;
                            break;
                    }
                    Console.WriteLine("{0} {1}", Convert.ToString(o), temp.EType);
                    events.Remove();
                }
                sum += temp.Time;
            }
            average = sum / 1000;
            Console.WriteLine(Convert.ToString(average));
            Console.ReadKey();

Answer 1

我很确定你的问题可以缩小到：

首先添加所有arriveeast的

for (double i = 0; i < totalTime; i += interArrivalEast)
{
      events.Add(new Event("arriveeast", i));
}

然后添加norths ...

然后在你的循环中按顺序写出来：

temp = events.Front();
//switch
Console.WriteLine("{0} {1}", Convert.ToString(o), temp.EType);

您的Console.WriteLine似乎并不关心switch声明中发生的事情，它只是在它们进来时写出来。

尝试按时间顺序打印发生的事件

1 个答案: