实现单链表表上的各种操作：初始化，创建，输出元素，销毁，插入，删除，定位，求表长、“判空”，单链表排序，两个链表的归并以及“删除重复的元素”共计12个操作。-Single-linked list form on a variety of operations: initialization, create and output elements, destruction, insert, delete, locate, find the table length, " sub-space