using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Collections;



namespace 快速排序

{

    class Program

    {

        static void Main(string[] args)

        {

            //新建一个数组

            int[] abc = new int[] { 5,7,6,2,4 };

            

            ArrayList arrlist = new ArrayList();

            //把数组添加到ArrayList中

            arrlist.AddRange(abc);

            Console.WriteLine("排序前：");

            //循环打印出每个元素

            foreach (int a in arrlist)

            {

                Console.Write("{0},", a);

            }

            //调用快速排序方法

            arrlist=QuickSort(arrlist);

            Console.WriteLine("排序后：");

            foreach (int a in arrlist)

            {

                Console.Write("{0},", a);

            }

            Console.ReadKey();

        }



        public static ArrayList QuickSort(ArrayList arr)

        {

            //只要集合里面元素个数大于1，就一直进行分开操作

            if (arr.Count > 1)