C语言中可复用的链表结构，可以不必关心用户数据结构完成链表的增删该查及排序、保存等操作，提供枚举器枚举链表数据(reusable linked list structure in C language.you don't have to worry about the user data structure, complete the additions and deletions of the list, check and sort, save, and so on, and provide