.学生的记录信息要保存在磁盘文件中（记录结构至少应包括以下四项：学号、姓名、累计次数、学分）。学分计算方法：在本学期内累计次数达到20次，可得到0.5学分，否则没有学分，新学期开始累计次数从0开始累计。在大学期间，最多可得到2学分。该系统具有如下功能：

（1）学生记录输入。

（2）跑步签到（每签到一次，累计次数加1）。

（3）查询（可按学号、学分等进行查询）。

（4）插入新生的记录。

-. Students to record information stored in the disk file (record structure of at least four should include the following: Student ID, name, the cumulative number of credits). Credits calculated as follows: During the semester with a total of 20 times the number of available credits 0.5, otherwise there is no credits, the cumulative number of the new semester started a total of from 0. At the university during the period up to receive 2 credits. The system has the following features: (1) student input record. (2) running attendance (per sign in once, the cumulative increase in the number 1). (3) query (according to study number, credit inquiries, etc.). (4) insert new records.