1、 成绩的录入：包括学生学号、姓名、性别和各门课程成绩的录入。\n"

<<" 2、 成绩的查询：可以根据学号或姓名查询某个学生的成绩。\n"

<<" 3、 成绩的修改：可以根据学号或姓名来修改相应的学生的成绩。\n"

<<" 4、 数据的删除：可以根据学号或姓名指定删除某个学生的数据。\n"

<<" 5、 成绩的统计分析：平均成绩。\n"

<<" 6、 总成绩和平均成绩的查询：可以根据学号或姓名查询。\n"

<<" 7、 浏览所有学生信息。\n"

<<" 8、 将所有学生信息保存成文件。\n"

<<" 9、 打开指定的数据文件。\n"

<<" 10、 按总成绩排序输出学生信息。\n"

<<" 11、 按学号顺序输出学生信息，并可保存成文件。\-1, the results of entry: the students learn number, name, gender and various courses results entry. \ N " < < "　2, the results query: according to the student number or name query the results of a student. \ N " < < "　3, modification of the results: according to the student number or name to modify the corresponding student achievement. \ N " < < "　4, data delete: delete a student' s data can be specified according to the student number or name. \ N " < < "　5, the results of statistical analysis: grade point average. \ N " < < "　6, the total score and grade point average of queries: queries based on student number or name. \ N " < < "　View all student information. \ N " < < "　8, all students save files. \ N " < < "　9 to open the specified data file. \ N " < < "　10, sort output by a total score of student information. \ N " < < "　11, the output of student