c#实验一：基于winform的冒泡排序练习

一、界面设计

在排序前textbox中输入数字，以逗号隔开，通过两个button实现降序排序或升序排序,然后在排序后textbox中显示

三个关键点：

1、监测输入是否合法，最好使用正则表达式

2、拆分textbox中字符串，使用String类的slipt方法

3、冒泡排序法

二、关于拆分textbox中字符串

1、如果以空格作为字符串结束标志，应采用以下语句

string str = textBox1.Text.Trim();
string[] ss = str.Split();

2、如果以逗号作为结束标志，应采用以下语句

string str = textBox1.Text.Trim();     或者　string str = textBox1.Text;
string[] ss = str.Split(\’,\’);

三、冒泡排序法

冒泡排序法就是把数组中的元素按从小到大或从大到小顺序排例,注意每次比较的次数依次减小

公式格式为：

1 for(int i = 0; i < array.length - 1; i++)2 {3          for(int j = 0; j < array.length - 1 - i; j++)          //不能忘减i4          {5                 int temp;6                 if(array[j] < array[j + 1])7                 {8                            temp = array[j];                     //这里决定了是降序，还是升序9                            array[j]   = array[j + 1] ;10                            array[j + 1] =temp;11                 }12          }13 }

四、完整代码:

1 using System;2 using System.Collections.Generic;3 using System.ComponentModel;4 using System.Data;5 using System.Drawing;6 using System.Linq;7 using System.Text;8 using System.Threading.Tasks;9 using System.Windows.Forms;10 using System.Text.RegularExpressions;1112 namespace 冒泡法排序13 {14     public partial class Form1 : Form15     {16         public Form1()17         {18             InitializeComponent();19         }2021         private void button2_Click(object sender, EventArgs e)          //降序排列22         {23             string str = textBox1.Text.Trim();24             //string str = textBox1.Text;25             string[] ss = str.Split();2627             string temp = \"\";28             for (int i = 0; i < ss.Length - 1; i++)29             {30                 for (int j = 0; j < ss.Length - 1 - i; j++)31                 {32                     if (int.Parse(ss[j])  < int.Parse(ss[j + 1]))33                     {34                         temp = ss[j];35                         ss[j] = ss[j + 1];36                         ss[j + 1] = temp;37                     }38                 }39             }40             for (int i = 0; i < ss.Length; i++)41             {42                 textBox2.AppendText(ss[i]);43                 textBox2.AppendText(\",\");44             }45         }4647         private void button1_Click(object sender, EventArgs e)          //升序排例48         {49             string str = textBox1.Text.Trim();50             //string str = textBox1.Text;51             string[] ss = str.Split(\',\');5253             string temp = \"\";54             for (int i = 0; i < ss.Length - 1; i++)55             {56                 for (int j = 0; j < ss.Length - 1 - i; j++)57                 {58                     if (int.Parse(ss[j]) > int.Parse(ss[j + 1]))59                     {60                         temp = ss[j];61                         ss[j] = ss[j + 1];62                         ss[j + 1] = temp;63                     }64                 }65             }66             for (int i = 0; i < ss.Length; i++)67             {68                 textBox2.AppendText(ss[i]);69                 textBox2.AppendText(\",\");70             }71         }7273         private void Form1_Load(object sender, EventArgs e)74         {75             int[] array = { 23, 24, 25, 21, 19, 16, 12, 32, 100, 98, 45, 67, 39, 48, 67, 54, 53, 27 };7677             for (int i = 0; i < array.Length - 1; i++)78             {79                 for (int j = 0; j < array.Length - 1-i; j++)80                 {81                     if (array[j] <= array[j + 1])82                     {83                         int temp = array[j];84                         array[j] = array[j + 1];   //把大的放在前面85                         array[j + 1] = temp;       //小的放在后面86                     }87                 }88             }8990             //for (int ik = 0; ik < array.Length; ik++)91             //{92             //    textBox2.AppendText(array[ik].ToString());93             //    textBox2.AppendText(\",\");94             //}95             foreach(int i in array)96             {97                 textBox2.AppendText(i.ToString());98                 textBox2.AppendText(\",\");99             }100         }101102         private void button3_Click(object sender, EventArgs e)103         {104             textBox1.Text = \"\";105             textBox2.Text = \"\";106         }107     }108 }

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