一个基于命令行交互方式的议程管理系统。已注册到系统的用户可添加、删除、查询系统中记录的会议安排；系统还提供新用户注册、清除某一用户所有会议安排等管理功能。-A command line based interactive agenda management system. Registered to the system users can add, delete, query, the system records the schedule of meetings system also p