（一）功能要求：

（1）　　信息维护：

要求：学生信息数据要以文件的形式保存，能实现学生信息数据的维护。此模块包括子模块有：增加学生信息、删除学生信息、修改学生信息

（2）　　信息查询：要求：查询时可实现按姓名查询、按学号查询

（3）　　成绩统计：要求：A输入任意的一个课程名（如数学）和一个分数段（如60--70），统计出在此分数段的学生情况。

（4）　　排序：能对用-(1) functional requirements : (a) maintaining information : Request : Student data to information in the form of a document preservation, Students can achieve the maintenance of information and data. This module, including sub-modules are : increased student information, delete information of students, student information changes (2) Information : Request : inquiries can be realized by name inquiries, inquiries by the school, (3) results statistics : requirements : A importation of an arbitrary courses (such as mathematics) and a fraction of the (60 -- 70), Statistics from the scores of the students of. (4) Ranking : The ability to use