一、问题描述

在年级成绩管理系统中，希望处理各班信息及各班每个学生的学习情况信息，其中班级信息包括班号和名称，学生学习情况信息包括学号，姓名，班号等，及已学课程的课程号及成绩，并能使管理人员通过界面完成对班级、学生信息的录入及对数据的查找和浏览。



二、基本要求

1、登记各班的学生基本情况（学号，姓名，性别，年龄，等信息）；

2、插入某班某个学生的基本情况；

3、修改各班学生基本情况；

4、删除某班某个学生或某班所有学生基本情况；

5、登记各班所有学生各门课的成绩；

6、修改某个学生某门功课的成绩；

7、浏览各班信息；

8、查找，浏览每个学生的基本信息；

9、查找，浏览每个学生的全部成绩信息；-A descr iption of the problem in grade performance management system, hope that the learning process of each student in each class and each class information, class information, including class number and name, student learning including student number, name, class number, and course number and the results of the course of study, and enables management to complete the entry of the class, student information and data search and browse through the interface. Basic requirements, the registration of each class of students (student number, name, sex, age, and other information)　2, insert the basic situation of a student in a class　modify his classes　4. delete all students in a class a student or a class　5, the registration of each class of the course results of all students　6, modify the results of a student has a homework　7, browse each class　8, Find Browse the basic information about each student　9, find, view each student' s transcr ipt information