using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace _99{    class Program    {        static void Main(string[] args)        {            int[] dns = new int[] { 3, 8, 9, 10, 16, 28, 36, 42, 58, 79, 98, 99 };            Console.Write("输入你要查找的数");            int n = Convert.ToInt32(Console.ReadLine());            int top, bottom, mid;            top = 0;            bottom = dns.Length - 1;            while (bottom>=top )            {                mid = (top + bottom) / 2;                int k = dns[mid];                if (k < n)                 {                    top = mid + 1;                }                else if (k > n)                 {                bottom=mid-1;                }else                {                    Console .WriteLine ("你找的值在"+mid+"位置");                    break;                              }                Console.ReadLine();            }                   }    }}