简单学生信息管理系统，要求如下：



（1）学生信息包括学号、姓名、生日、语文成绩、数学成绩、英语成绩。



（2）内存中以链表形式实现对学生数据的管理。



（3）可以查看所有学生信息



（4）可以添加一个学生信息



（5）可以删除一个学生信息



（6）可以根据学号修改一个学生信息



（7）可以将学生信息保存到磁盘文件



（8）可以从文件中载入学生信息



（9）可以按学号对学生信息进行排序



（10）完成一些学生信息的基本查询功能。如输入学生学号，查询某个学生的基本信息；查询数学分数大于90分的学生等。



（11）完成一些学生信息统计功能。如统计各科的最高、最低、平均分；统计及格人数，及格率、不及格的人数、不及格率等。

-Simple student information management system, requirements are as follows:



(1) student information including student number, name, date of birth, language scores, math scores and English scores.



(2) memory is implemented as a list of student data management.



(3) can view all the student information



(4) can add a student information



(5) can remove a student information



(6) can learn to modify a student information number



(7), student information can be saved to disk file



(8) can load the student information from the file



(9) The number of students can learn to sort the information



(10) completed some of the students the basic query capabilities of information. If students enter the school number, check a student s basic information　query more than 90 points in math scores of students and so on.



(11) to complete some of the students information statistics. Subjects such as statistics the maximum, minimum, average　statistics the number of passes, passing