冒泡排序法

using System;
using System.Collections.Generic;
using System.Text;

namespace 数组排列
...{
    class Program
    ...{
        static void Main(string[] args)
        ...{   int a=3;
        
            int[] str = new int[5] ...{ 4, 2, 9, 8, 7 };//声明初始化要排序的数组
            for (int i = 0; i <= 4; i++)//比较的次数循环
            ...{
                int j = 0;
                bool comeup = false;//判断交换发生的bool变量
                while (j <= a)//数组比较循环
                ...{
                    int b = 0;//这是一个中转变量
                    if (str[j] >str[j+1])//如果前一个数组成员的值大于后一个数组成员则进行值交换
                    ...{ b = str[j+1];
                    str[j+1] = str[j];
                    str[j] = b;
                    comeup = true;
                    }
                    j++;
                    }
                    if (comeup==false)//如果值未进行过值交换，那么退出循环
                    ...{
                        for (int l = 0; l <= 4; l++)
                        ...{
                            Console.Write(str[l]);


                        }
                        break;
                }
            a--;//a的值减小1                                                    
            }

        }
        

    }
}