本篇和大家讨论该“学生管理系统”的核心部分――一个特殊的数据结构。该数据结构的名称为

DLinkedStuCollection 即一个双向的链表，可以完成向前向后的遍列，同时还能在内存中没有数据时自动从

文件系统加载记录，还可以在内存中的数据到达某个极限的时候将某些记录保存到文件了！。-Benpian and we discuss the " student management system,"　the core part- a special data structure. This data structure is named DLinkedStuCollection that a two-way linked list, you can complete the forward and backward over the bar, while there is no data in memory automatically loads records from the file system, but also in-memory data reaches a limit Some time will be saved to a file of records! .