随机产生一组数，实现下面6种排序算法：插入排序、起泡排序、选择排序、Shell排序、快速排序根据键盘输入选择“从大到小”还是“从小到大”两种方式；

4）根据键盘输入选择其中一种排序算法；

-A set of randomly generated numbers, to achieve the following six kinds of sorting algorithms: insertion sort, bubble sort, selection sort, Shell sort, quick sort based on keyboard input select " descending"　or " small to large"　in two ways　4) choose one according to keyboard input sorting algorithm