程序由client和server两部分组成，主要通过其间的流传输及其相应的通讯字符串实现。client和server端均通过对对方信息的判断而进行相应的处理以达到最终效果。 其中关键的数据存储为文件存储。服务器为每个新用户创建相应的数据文件以存储用户的选课信息，而客户的选课信息查询也同样是通过对文件信息的读取实现-procedures by client and the server is composed of two parts, mainly through the flow of traffic during the corresponding realization of a string of communications. Client-server and all the other information on the judgment accordingly processing to achieve the ultimate effect. Key data storage for file storage. For each new server users create corresponding data files to store user information classes, and the client Course Information is also passed on the information document read to achieve