1.编制一个成绩记录簿，里面有学生的信息，例如包括：学号、姓名、以及C语言课程的成绩。该程序要实现的具体功能有：

 创建信息链表并以磁盘文件保存；

 读取磁盘文件并显示输出所有学生的成绩；

 按学号或姓名查询成绩；

 添加学生成绩记录；

 删除学生成绩记录；

 修改指定姓名或学号的学生的成绩并可存盘；

 显示输出60分以下、60~69、70~79、80~89、90分以上各分数段的学生记录，并可按学生的c语言课程成绩排序各分数段学生记录。

-Preparation of an achievement record book, there are student information, including, for example: student number, name, and the results of the C language courses. The program to achieve specific functions: •　Create a linked list of information and save to disk file　　read the disk file and displays the output of all students　　query results by student number or name　　Add the students'　academic records　　delete students track record　　modify the specified name or student number, student achievement and can save　　display output for the following 60 points, 60 to 69, 70 to 79, 80 ~ 89, 90 points or more student records in each fraction, and may students of the c language courses in each fraction of the results sort student records.