private static void QueryByMid()        {            int[] array = new int[] { 23, 33, 34, 43, 67, 78, 79 };            int low = 0;            int high = array.Length - 1;//这句很重要,减1避免数组值比较时索引超出            int mid = 0;            int queryNum = 78;//待查找的数            int queryIndex = -1;            while (low <= high)            {                mid = (low + high) / 2;                if (queryNum == array[mid])                {                    queryIndex = mid;                    break;                }                else                {                    if (queryNum < array[mid])                    {                        high = mid - 1;                    }                    else                    {                        low = mid + 1;                    }                }            }            if (queryIndex == -1)            {                Console.WriteLine("没有查找到对应的数据");            }            else            {                Console.WriteLine("数据查找到的索引位置：" + queryIndex);            }        }