本程序实现了学生成绩管理的相关功能。学生的信息用了一个线性表来存储，记录了学生的姓名、学号、三门课的成绩和排名。在程序运行之前就已经记录了一些同学的信息，并保存到文件中，下次再运行时自动将信息导入，程序结束后又将修改或添加的信息保存到同一文件中。程序定义了输入学生成绩、按不同方式查询学生成绩、添加和修改等方法。老师可以对成绩按各种条件查询、统计和排序，并能够以班级为单位打印成绩单。学生可以对自己的成绩和排名进行查询。-This program implements the management of student achievement-related features. The information the students used a linear list to store and record the student' s name, school number, three classes of results and ranking. Before running the program had been recorded some students information, and save to a file, the next re-run automatically import the information into the program after the end of the modified or added information is saved to the same file. Program defines the input to student performance, according to student performance in different ways query, add and modify methods. Teachers can check on the results according to various conditions, statistics and sorting, and be able to print transcr ipts of classes as a unit. Students for their achievements and ranking query.