1)　　编制成绩记录簿，包括学生的信息：学号、姓名、以及C语言课程的成绩。可实现如下功能：

a．显示全部成绩记录；

b．分别按学号和姓名查询成绩；

c．执行一次删除、添加一条或多条成绩；

d．分别按学号和姓名修改成绩，并同时覆盖原文件；

e.按分数段分组，按学生成绩高低进行排序。

-1) the preparation of performance record book, including the student information: student number, name, and the C language program results. Can achieve the following functions: a. Show all academic records　b. Student ID and name respectively query results　c. Perform a delete, add one or more results　d. Student ID and name were modified by results, and also overwrite the original file　e. grouped according to scores section, sort by student achievement level.