[a]两种人可以登录系统，用户和管理员。用户通过用户名和密码可以登录系统，登录后可以查看所有房源，并预订自己需要的房源。管理员可以修改已发布的所有房源的信息，如楼层、面积、价格等；可以添加新的房源，删除无用房源，确认用户的预定，添加用户等。[b]能实现多线程支持，即多用户和管理员能同时上线。[c]退出系统后服务器上保留所有信息。

-[a] two people can sign systems, users and administrators. Users through the user name and password can log in system log after all the houses can view and book their own housing needs. Administrators can modify all the houses has released the information, such as floors, size, price, etc.　can add new housing, delete useless availability, confirm the user' s scheduled to add users. [b] to achieve multi-threading support, which many users and administrators can simultaneously on-line. [c] exit system to retain all the information server.