一个基于链表的，学生人员信息、成绩信息管理，可以插入、查询、删除、修改，并能够取得最好成绩，以及排名前5名成绩人员信息-Based on a list of student personnel information, performance management information, you can insert, query, delete, modify, and be able to obtain the best results, and the top five scores personnel information