需要实现如下图所示的人机猜拳小游戏：

我们需要建立一个玩家类Player、一个电脑类Computer、一个裁判类Judge来分别模拟各自的操作：

【Player.cs】

/*
 * 作者：JeronZhou
 * 时间：2021-11-01
 * 功能：石头剪刀布游戏
 */

using System;

namespace Test2_2
{
	public class Player
	{
        public string FistName { get; set; }
       	public int Play(string name)
       	{
            FistName = name;
            switch (FistName)
            {
                case "石头":
                    return 1;
                case "剪刀":
                    return 2;
                case "布":
                    return 3;
                default:
                    return 0;
            }
        }
	}
}

【Computer.cs】

/*
 * 作者：JeronZhou
 * 时间：2021-11-01
 * 功能：石头剪刀布游戏
 */

using System;

namespace Test2_2
{
	public class Computer
	{
        public string FistName { get; set; }
        public int RandomPlay()
        {
            Random random = new Random(Guid.NewGuid().GetHashCode());
            int num = random.Next(1, 4);
            switch (num)
            {
                case 1:
            		FistName = "石头";
            		break;
                case 2:
            		FistName = "剪刀";
            		break;
                case 3:
            		FistName = "布";
            		break;
            }
            return num;
        }
	}
}

【Judge.cs】

/*
 * 作者：JeronZhou
 * 时间：2021-11-01
 * 功能：石头剪刀布游戏
 */

using System;

namespace Test2_2
{
	public class Judge
	{
        public string Win(int play, int computer)
        {
            int result = play - computer;
            switch (result)
            {
                case -1:
               		return "你赢了";
                case 2:
                    return "你赢了";
                case -2:
                    return "你输了";
                case 1:
                    return "你输了";
                default:
                    return "平手";
            }
        }
	}
}

【窗体设计】
共有5个标签（3个空标签），三个按钮。

【MainForm.cs】

/*
 * 作者：JeronZhou
 * 时间：2021-11-01
 * 功能：石头剪刀布游戏
 */

using System;
using System.Windows.Forms;

namespace Test2_2
{
	public partial class MainForm : Form
	{
		public MainForm()
		{
			InitializeComponent();
		}
		void Button1Click(object sender, EventArgs e)
		{
            Player p = new Player();
            int playerName = p.Play(button1.Text);
            label3.Text = p.FistName;
            Computer c = new Computer();
            int computerName = c.RandomPlay();
            label4.Text = c.FistName;
            Judge judge = new Judge();
            label5.Text = judge.Win(playerName, computerName);
		}
		void Button2Click(object sender, EventArgs e)
		{
            Player p = new Player();
            int playerName = p.Play(button2.Text);
            label3.Text = p.FistName;
            Computer c = new Computer();
            int computerName = c.RandomPlay();
            label4.Text = c.FistName;
            Judge judge = new Judge();
            label5.Text = judge.Win(playerName, computerName);
		}
		void Button3Click(object sender, EventArgs e)
		{
            Player p = new Player();
            int playerName = p.Play(button3.Text);
            label3.Text = p.FistName;
            Computer c = new Computer();
            int computerName = c.RandomPlay();
            label4.Text = c.FistName;
            Judge judge = new Judge();
            label5.Text = judge.Win(playerName, computerName);
		}
	}
}

【Program.cs】

/*
 * 作者：JeronZhou
 * 时间：2021-11-01
 * 功能：石头剪刀布游戏
 */

using System;
using System.Windows.Forms;

namespace Test2_2
{
	internal sealed class Program
	{
		[STAThread]
		private static void Main(string[] args)
		{
			Application.EnableVisualStyles();
			Application.SetCompatibleTextRenderingDefault(false);
			Application.Run(new MainForm());
		}
	}
}

【测试结果】