音乐库需求分析报告1.系统背景................................................................................................22.系统功能................................................................................................23.用户类和特征.........................................................................................34.用户业务流程图......................................................................................41.普通用户：.......................................................................................42.VIP 用户...........................................................................................43.系统管理员.......................................................................................54.用户视图..........................................................................................51.普通用户....................................................................................52.VIP 用户.....................................................................................63.系统管理员.................................................................................65.实体分析 ER 图.......................................................................................76.数据流程图.............................................................................................87.数据库的创建.........................................................................................88.表的创建................................................................................................91.歌曲信息：music information.....................................................92.歌曲类型：music type................................................................93.意见和建议：opinions...............................................................104.用户资料：user information.....................................................105.登录信息：enter information...................................................116.歌曲下载方式：dow...
