C#数组的排序（正序逆序）

C#数组的排序（正序逆序）

这种排序 超级简单的 ！

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

namespace ConsoleApplication4
{
    class Program
    {
        static void Main(string[] args)
        {   

            string[] str = { "d","h","a","c","g","t","e","u","b"};

            var lowtohigh = from p in str orderby p select p; //linq
            str = lowtohigh.ToArray();
            foreach (var item in str)
            {
                Console.WriteLine("正序排列" + item);//正序排列
            }
            //=================================================
            for (int i = 0; i < str.Length/2;i ++ )
            {
                string temp=str[i];              //新建一个变量相互交换
                str[i]=str[str.Length-i-1];
                str[str.Length - i - 1] = temp;//相互交换
            }
            foreach (var newstr in str)
            {
                Console.WriteLine("逆序排列："+newstr);
            }
            Console.WriteLine("===================================");
           //###############################################
            int[] num = { 5, 78, 9, 1, 8, 4, 2, 88, 3 };
            var lowtohigh1 = from p in num orderby p select p;
            num = lowtohigh1.ToArray();
            foreach (var num1 in num)
            {
                Console.WriteLine(num1);//正序排列
            }

            for (int i = 0; i < num.Length / 2;i++ )
            {
               int temp =num[i];             //新建一个变量相互交换
                num[i] = num[num.Length - i - 1];
                num [num.Length - i - 1] = temp;//相互交换
            }
            foreach (var newnum in num)
            {
                Console.WriteLine("逆序排列：" + newnum);
            }
            Console.WriteLine("===================================");

        }
    }
}

　　

结果：