采用Ｌｉｎｕｘ内核链表的形式，实现了一个双向链表的增删改查功能的简单系统 适合学习Ｌｉｎｕｘ内核链表的用法-In the form of Linux kernel linked list to achieve a simple CRUD functionality of a doubly linked list system for learning how to use the Linux kernel list