经典排序算法 – 基数排序Radix sort

        /// <summary>
        /// 基数排序
        /// 约定:待排数字中没有0,假设某桶内数字为0则表示该桶未被使用,输出时跳过就可以
/// </summary>
        /// <param name="unsorted">待排数组</param>
        /// <param name="array_x">桶数组第一维长度</param>
        /// <param name="array_y">桶数组第二维长度</param>
        static void radix_sort(int[] unsorted, int array_x = 10, int array_y = 100)
        {
            for (int i = 0; i < array_x/* 最大数字不超过999999999...(array_x个9) */; i++)
            {
                int[,] bucket = new int[array_x, array_y];
                foreach (var item in unsorted)
                {
                    int temp = (item / (int)Math.Pow(10, i)) % 10;
                    for (int l = 0; l < array_y; l++)
                    {
                        if (bucket[temp, l] == 0)
                        {
                            bucket[temp, l] = item;
                            break;
                        }
                    }
                }
                for (int o = 0, x = 0; x < array_x; x++)
                {
                    for (int y = 0; y < array_y; y++)
                    {
                        if (bucket[x, y] == 0) continue;
                        unsorted[o++] = bucket[x, y];
                    }
                }
            }
        }

        static void Main(string[] args)
        {
            int[] x = { 999999999, 65, 24, 47, 13, 50, 92, 88, 66, 33, 22445, 10001, 624159, 624158, 624155501 };
            radix_sort(x);
            foreach (var item in x)
            {
                if (item > 0)
                    Console.WriteLine(item + ",");
            }
            Console.ReadLine();
        }