建立学生信息管理系统，实现一系列的功能：

存储信息：实现对信息的插入、删除、修改等功能；

查询信息 ：显示全部学生信息、按学号查询、按姓名查询、按性别查询、按年级查询学生所学课程、按教师查询听课学生；

排序：实现按学号、按年龄、按某课成绩、按总成绩进行排序；

统计：男女生人数、每个人的平均成绩、各课的平均成绩；-The establishment of Student Information Management System to achieve a series of functions: storage of information: the realization of information insertion, deletion, modification and other functions　query information: Show All student information, according to study its inquiries, inquiries by name, by gender inquiry, by grade Inquiries by students learning courses, students attend lectures by teachers inquiries　ranking: No. achieve by learning, by age, according to results of a certain class, by a total score sort　statistics: the number of boys and girls, each person s average scores, the class average scores