说明：  利用随机选择的数据，建立一个链表，实现下列6个功能：查看链表、创建链表、链表长度、删除链表、重建链表等功能。
(Randomly selected data, and the establishment of a linked list, and to achieve the following six functions: View the list, create a list, the list length, delete the linked list, reconstruction of the linked list functions.)