该程序实现了以下功能：

1建立链表把表中所有数据都从文件输入。姓名，课程名，可以用字符数组存储，上表其它不能定义数组。（纵向/横向，均为链表）.

2输出链表中所有数据包括姓名，课程名，成绩 3统计每个学生选修课的门数.

4求每个学生的平均成绩 5．给某个学生追加一个一门课程（课程名和成绩）

6追加一个学生的信息（姓名，若干门课程和成绩） 7保存数据到一个新的文件中 8退出.

-The program implements the following functions: to establish a linked list of all the data in the table from the file input. Name, course name, you can use a character array storage, the table can not be defined array. (Vertical/horizontal, are linked list). 2 output linked list of all the data including name, course name, score 3 Statistical gate count of each student elective. Seek each student' s grade point average. Appended to a student a one course (course names and grades) six additional student information (name, number of courses and grades) to save data to a new file exit in eight.