简单且不完善的聊天室程序没有连接数据库，登陆程序用的列表实现要在c盘下创建一个用户信息的文本文档，改改可以用于课程设计的借鉴，参考-Does not sound simple chat program does not connect to the database, a list of landing procedures used to achieve a user to create a text document information in the c drive, changed c