当前位置:编程学习 > asp >>

快速排序代码

using System;
using System.Collections.Generic;
using System.Text;
namespace temp
{
    public class QuickSort  
    {
        /// <summary>  
        /// 排序
        /// </summary>   
        /// <param name="numbers">待排序数组</param>  
        /// <param name="left">数组第一个元素索引Index</param>   
        /// <param name="right">数组最后一个元素索引Index</param>   
        private static void Sort(int[] numbers,int left,int right)   
        {   
            //左边索引小于右边,则还未排序完成   
            if (left < right)   
            {   
                //取中间的元素作为比较基准,小于他的往左边移,大于他的往右边移   
                int middle = numbers[(left + right) / 2];   
                int i = left - 1;   
                int j = right + 1;
                while (true)   
                {
                    while (numbers[++i] < middle && i < right)
                    { ;}
                    while (numbers[--j] > middle && j > 0)
                    { ;}                    
                    if (i >= j) break;
                    Swap(numbers,i,j);
                }   
                Sort(numbers,left,i - 1);  
                Sort(numbers,j + 1,right);  
            }   
        }   
        /// <summary>   
        /// 交换元素值   
        /// </summary>   
        /// <param name="numbers">数组</param>   
        /// <param name="i">当前左边索引</param>   
        /// <param name="j">当前右边索引</param>   
        private static void Swap(int[] numbers,int i,int j)  
        {   
            int number = numbers[i];  
            numbers[i] = numbers[j];   
            numbers[j] = number;
        }  
        public static void Main()  
        {  
            int[] arr = { 6,5,2,9,7,4,0,-1,-4,-2,3,2,0,9 };  
            Sort(arr, 0, arr.Length-1);  
            StringBuilder temp = new StringBuilder();
            for (int i = 0; i <= arr.Length-1; i++)  
            {  
                temp.Append(arr[i].ToString()+",");
            }  
            Console.WriteLine(temp.ToString().Substring(0, temp.Length-1));  
            Console.ReadLine();  
        }  
    }  
}

 
作者 张银

补充:Web开发 , ASP.Net ,
CopyRight © 2022 站长资源库 编程知识问答 zzzyk.com All Rights Reserved
部分文章来自网络,