算法

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class _Default : System.Web.UI.Page
{
     
    protected void Page_Load(object sender, EventArgs e)
    {

      int a = 4;

      int b=aaa(a);
      Response.Write(b+"----"+a);
        //int[] comparValue = { 11, 22, 11, 11, 33, 11, 22 };
        //var query = (from num in
        //                 (
        //                 from number in comparValue
        //                 group number by number into g
        //                 select new
        //                 {
        //                     number = g.Key,
        //                     cnt = g.Count()
        //                 }
        //             )
        //             orderby num.cnt descending
        //             select num.number).First();
        //Response.Write(query);  
        
        //var num = new string[] { "111","2222","111","55555"};

        //var linqVal = from nums in num
        //              group nums by nums.Length into newLinq
        //              orderby newLinq.Key descending
        //              select new
        //              {
        //                  count = newLinq.Key,
        //                  word = newLinq
        //              };


        //foreach (var i in linqVal)
        //{
        //    Response.Write(string.Format("长度是:{0}<br>", i.count));
        //    foreach (var j in i.word)
        //    {
        //        Response.Write(string.Format("&nbsp;{0}<br>", j));
        //    }
        //}





        //int[] intNum = new int[100];
        //System.Collections.ArrayList myList = new System.Collections.ArrayList();
        //Random rom = new Random();

        //while (myList.Count < 100)
        //{
        //    int num = rom.Next(1,101);
        //    if (!myList.Contains(num))
        //        myList.Add(num);
        //}

        //for (int i = 0; i < 100; i++)
        //{
        //    intNum[i] = (int)myList[i];
        //}

        //var Asc = from l in intNum
        //          orderby l ascending
        //          select l;

        //foreach (var i in Asc)
        //{
        //    Response.Write(i+"</br>");
        //}
        //Response.Write(Process1(5));

       // Response.Write(Process2(100));

       // Response.Write(Process3(9) - Process3(8));
    }

    public int aaa(int aa)
    {

        return aa = aa * aa;
    }


    //public static int Process1(int i)
    //      {
    //         //计算数组{1,1,2,3,5,8.......} 第30位值
    //         if (i == 0) return 0;
    //         if (i == 1) return 1;
    //         else
    //             return Process1(i - 1) + Process1(i - 2);
    //     }


    //public static int Process2(int i)
    //{
    //    //计算1+2+3+4+...+100的值
    //    if (i == 0) return 0;
    //    else
    //        return Process2(i - 1) + i;
    //}

    public static int Process3(int i)
    {
        //计算1 -2 +3 -4+ 5- 6 + 7 - 8 + 9的值
        if (i == 0) return 1;
        if (i == 1) return 2;
        else return Process3(i - 2) + i;
    }
    
 

}

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            for (int i = 1; i < 10; i++)
            {
                for (int j = 1; j <= i; j++)
                {
                    Console.Write(string.Format("{0}*{1}={2}\t",i,j,i*j));
                }
                Console.WriteLine();
            }
        }
    }
}