1 using System;
  2 using System.Windows.Forms;
  3 
  4 namespace 猜拳小游戏
  5 {
  6     public partial class Form1 : Form
  7     {
  8         public Form1()
  9         {
 10             InitializeComponent();
 11             // button1.Click += (s, e) => { shitou(); };
 12             button2.Click += (s, e) => { jiandao(); };//别忘了，事件只能出现在+=、-=左边
 13             button3.Click += (d, e) => { bu(); };
 14         }
 15         //其实button1.Click += (s, e) => { shitou(); };和下面的这写法是一样的
 16         private void button1_Click(object sender, EventArgs e)
 17         {
 18             shitou();
 19         }
 20 
 21         /// <summary>
 22         /// 石头
 23         /// </summary>
 24         public void shitou()
 25         {
 26             label4.Text = button1.Text;
 27             label3.Text = bj(toint(), pc());
 28         }
 29 
 30         /// <summary>
 31         /// 剪刀
 32         /// </summary>
 33         public void jiandao()
 34         {
 35             label4.Text = button2.Text;
 36             label3.Text = bj(toint(), pc());
 37         }
 38 
 39         /// <summary>
 40         /// 布
 41         /// </summary>
 42         public void bu()
 43         {
 44             label4.Text = button3.Text;
 45             label3.Text = bj(toint(), pc());
 46         }
 47 
 48         /// <summary>
 49         /// 电脑随机显示，还有相应的值替代它
 50         /// </summary>
 51         /// <returns></returns>
 52         public int pc()
 53         {
 54             Random ran = new Random();
 55             int vpc = ran.Next(1, 4);
 56             // string strpc;//这样写会浪费资源，在堆中要开辟很多空间
 57             //这样，每次调用pc方法时strpc都是初始为空的。
 58             //重要的是string类型是引用类型。
 59             string strpc = string.Empty;//初始为空
 60             switch (vpc)
 61             {
 62                 case 1:
 63                     strpc = "石头";
 64                     break;
 65                 case 2:
 66                     strpc = "剪刀";
 67                     break;
 68                 case 3:
 69                     strpc = "布";
 70                     break;
 71                 default:
 72                     throw new Exception("未知错误");
 73             }
 74             label5.Text = strpc;
 75             return vpc;
 76         }
 77 
 78         /// <summary>        
 79         /// 把剪刀石头布用数字表示
 80         /// </summary>
 81         /// <returns></returns>
 82         public int toint()
 83         {
 84             int n;
 85             switch (label4.Text)
 86             {
 87                 case "石头":
 88                     n = 1;
 89                     break;
 90                 case "剪刀":
 91                     n = 2;
 92                     break;
 93                 case "布":
 94                     n = 3;
 95                     break;
 96                 default:
 97                     throw new Exception("出错了");
 98             }
 99             return n;
100         }
101 
102         /// <summary>
103         /// 比较
104         /// </summary>
105         /// <param name="user"></param>
106         /// <param name="pc"></param>
107         /// <returns></returns>
108         public string bj(int user, int pc)
109         {
110             int tmp = user - pc;
111             string bj = string.Empty;
112             if (tmp == 1 || tmp == -2)
113             {
114                 bj = "你赢了";
115             }
116             else if (tmp == 0)
117             {
118                 bj = "平局";
119             }
120             else
121             {
122                 bj = "你输了";
123             }
124             return bj;
125         }
126     }
127 }