1)能够从屏幕上读取一个学生的信息并将信息存入到数据文件中。

2)能够将指定的信息从文件中删除。

3)能够按编号、姓名对学生的信息进行检索并将检索结果显示在屏幕上。

4)可以统计全部学生的总成绩，及其在班上的排名。

5)能够统计各科的平均成绩及及格率。

6)要求有错误提示功能，例如性别只能输入男女，输入错误提示重新输入。

7)如果检索不到相应的信息应提示用户。-1) can be read from the screen of a student s information and information into the data file. 2) can be specified to delete information from the document. 3) able to code, name of student information retrieval and search results displayed on the screen. 4) statistics for all students can be a total score and its role in the class rankings. 5) to the Census and Statistics Branch of the average scores and passing rate. 6) requires error functions, such as gender can only enter the men and women re-enter the input error. 7) If less than the corresponding information retrieval should prompt the user.