希尔排序算法

static void shell_sort(int[] unsorted, int len)
        {
            int group, i, j, temp;
            for (group = len / 2; group > 0; group /= 2)
            {
                for (i = group; i < len; i++)
                {
                    for (j = i - group; j >= 0; j -= group)
                    {
                        if (unsorted[j] > unsorted[j + group])
                        {
                            temp = unsorted[j];
                            unsorted[j] = unsorted[j + group];
                            unsorted[j + group] = temp;
                        }
                    }
                }
            }
        }