数组反转

/*
 * Created by SharpDevelop.
 * User: Administrator
 * Date: 2011-5-24
 * Time: 17:28
 * 
 * To change this template use Tools | Options | Coding | Edit Standard Headers.
 */
using System;

namespace a16
{
    class Program
    {
        public static void Main(string[] args)
        {
            string[] arr=new string[]{"a","b","c","d","e","f","g"};
            int lon=arr.Length;
            for(int i=0;i<lon/2;i++)
            {    string a=arr[i];
                arr[i]=arr[lon-i-1];
                arr[lon-i-1]=a;
            }
            for(int i=0;i<lon;i++)
            {
                Console.WriteLine(arr[i]);
            }
            Console.ReadKey(true);
        }
    }
}