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服务计算概论实验报告
一、实验目的
了解多线程，并学会应用。
二、实验内容
编写一个java或c#多线程程序模拟乒乓球双打比赛。在该问题中，你必须使用监听器和事件。
三、实验要求
(1)有四个选手，A1和A2为一队，B1和B2为另外一队。A1首先发球(启动球)，然后B1，A2,B2将最后发球。每一轮中选手发六个球。
(2)选手不改变他们的位置。
(3)比赛期间，双方选手必须轮流发球(用事件定义次序)并且在同一队中的两个选手可以竞争发球(用monitor同步他们)。
(4)当轮到某个选手时，他/她可调用一个叫做shot(rate)的随机函数来模拟该比赛。如果是给定的概率该函数返回会“in”，如果是用1减去给定的概率，则返回“out”。例如如果rate=85%,则球在界内的概率是85%，出街的概率是15%。
(5)如果shot函数返回in，对方选手必须通过调用shot函数把球打回。
(6)如果shot函数返回out，对方选手将赢得1分，必须开始一个新的发球。
(7)当每个选手发完6个球后比赛终止，分数最多的一队将赢得比赛比赛。如果两队比赛分数一样多，比赛平局。
四、源程序及程序作用
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
 
namespace ConsoleApplication1
{
    class TableTennis
    {
        Random rand;
        AutoResetEvent A1event, A2event, B1event, B2event;
        int turn, rate, Apoints, Bpoints, totalServes;
        bool serve, gamePlay;
        static void Main(string[] args)
        {
            TableTennis a = new TableTennis();
        }
        public TableTennis()
        {
            totalServes = 0;
            serve = true;
            gamePlay = true;
            long tick = DateTime.Now.Ticks;
            rand = new Random((int)(tick & 0xffffffffL) | (int)(tick >> 32));
            //多线程
            A1event = new AutoResetEvent(false);
            A2event = new AutoResetEvent(false);
            B1event = new AutoResetEvent(false);
            B2event = new AutoResetEvent(false);
            Thread A1 = new Thread(playerA1);
            Thread A2 = new Thread(playerA2);
            Thread B1 = new Thread(playerB1);
            Thread B2 = new Thread(playerB2);
            A1.Start();
            A2.Start();
            B1.Start();
            B2.Start();
            A1event.Set();
        }
    
        public bool shot(int rate)//击球概率
        {
            rate = rand.Next(1, 100);
            if (rate < 86)
                return true;
            else
                return false;
        }
        //概率函数，有85%的概率成功打过去。
        public void notifyNextServer()//唤醒所有等待的程序运行
        {
            switch (turn)
            {
                case 0:
                    A1event.Set();
                    break;
                case 1:
                    B1event.Set();
                    break;
                case 2:
                    A2event.Set();
                    break;
                case 3:
                    B2event.Set();
                    break;
            }
        }
        public void aSwing(string str)
        {
            if (shot(rate))
            {
                // if I got to the ball first if (shot(rate)) {
                Console.Write("-" + str + "-in");
                // wake up other side
                if (str == "A1") B2event.Set();
                else B1event.Set();
            }
            else
            {
                Console.Write("-" + str + "- out \n");
                Bpoints++;
                Console.WriteLine(" The side B1B2 wins.Score=({0},{1} ) ", Apoints, Bpoints);
                // check if that was the winning point
                if (!gameDone())
                {
                    serve = true;
                    notifyNextServer();
                }
            }
        }
        public void aServe(string str)
        {
            if (shot(rate))
            {
                Console.Write(str + "- in ");
                //wake up other side
                if (str == "A1") B2event.Set();
                else B1event.Set();
            }
            else
            {
                Console.Write(str + "- out \n");
                Bpoints++;
                Console.WriteLine("The side B1B2 wins.Score =({0},{1})", Apoints, Bpoints);
                //check if that was the winning point
                if (!gameDone())
                {
                    serve = true;
                    notifyNextServer();
                }
            }
        }
 
        public void bSwing(string str)
        {
            if (shot(rate))
            {
                // if I got to the ball first if (shot(rate)) {
                Console.Write("-" + str + "-in");
                // wake up other side
                if (str == "B1") A1event.Set();
                else A2event.Set();
            }
            else
            {
                Console.Write("-" + str + "- out \n");
                Apoints++;
                Console.WriteLine(" The side A1A2 wins.Score=({0},{1} ) ", Apoints, Bpoints);
                // check if that was the winning point
                if (!gameDone())
                {
                    serve = true;
                    notifyNextServer();
                }
            }
        }
        public void bServe(string str)
        {
            if (shot(rate))
            {
                Console.Write(str + "- in ");
                //wake up other side
                if (str == "B1") A1event.Set();
                else A2event.Set();
 
            }
            else
            {
                Console.Write(str + "- out \n");
                Apoints++;
                Console.WriteLine("The side A1A2 wins.Score =({0},{1})", Apoints, Bpoints);
                //check if that was the winning point
                if (str == "B1") A1event.Set();
                else A2event.Set();
                if (!gameDone())
                {
                    serve = true;
                    notifyNextServer();
                }
            }
        }
 
 
        public void playerA1()
        {
            //while game in play
            do
            {
                A1event.WaitOne();//write on myevent
                if (serve && turn == 0)//if it is my to serve
                {
                    serve = false;//then serve
                    turn = 1;
                    totalServes++;
                    aServe("A1");
                }
                else
                {
                    //if i got to the ball first
                    aSwing("A1");
                }
            }
            while (gamePlay);
        }
        public void playerA2()
        {
            //while game in play
            do
            {
                A2event.WaitOne();//write on myevent
                if (serve && turn == 2)//if it is my to serve
                {
                    serve = false;//then serve
                    turn = 3;
                    totalServes++;
                    aServe("A2");
                }
                else
 
                {
                    //if i got to the ball first
                    aSwing("A2");
                }
            }
            while (gamePlay);
        }
 
        public void playerB1()
        {
            //while game in play
            do
            {
                B1event.WaitOne();//write on myevent
                if (serve && turn == 1)//if it is my to serve
                {
                    serve = false;//then serve
                    turn = 2;
                    totalServes++;
                    aServe("B1");
                }
                else
 
                {
                    //if i got to the ball first
                    bSwing("B1");
                }
            }
            while (gamePlay);
        }
 
        public void playerB2()
        {
            //while game in play
            do
            {
                B2event.WaitOne();//write on myevent
                if (serve && turn == 3)//if it is my to serve
                {
                    serve = false;//then serve
                    turn = 0;
                    totalServes++;
                    bServe("B2");
                }
                else
                {
                    //if i got to the ball first
                    bSwing("B2");
                }
            }
            while (gamePlay);
        }
        public bool gameDone()
        {
            if (totalServes == 24)
            {
                if (Apoints > Bpoints)
                    Console.WriteLine("Final score = ({0},{1}).The team A1A2 wins", Apoints, Bpoints);
                else if (Apoints < Bpoints)
                    Console.WriteLine("Final score = ({0},{1}).The team B1B2 wins", Apoints, Bpoints);
                else
                    Console.WriteLine("Final score = ({0},{1}).The two teams tie", Apoints, Bpoints);
                gamePlay = false;
                return true;
            }
            else return false;
 
        }
    }
五、}实验结果


六、实验分析
 
通过这次实验，我对服务计算概论这门课有了进一步的深层次了解，把理论知识应用于实验中，也让我重新熟悉了多线程的相关内容，加深了对多线程知识的了解和用途的理解。