说明：  学生成绩管理程序设计源代码，文件形式输入输出数据，统计平均分最高分最低分结果写入文件，按学号查询成绩输出至屏幕，打印不合格优等生名单等功能，下载即可用。
(Student achievement management program design source code, file form input and output data, statistical average score highest and lowest score results written to the file, according to the school number inquiry results output to the screen, print the list of unqualified top students and other functions, download is available.)