数据库的主要数据包括：姓名、工作单位、电话号码、E-mail地址。

要求具有以下功能：

（1）系统以菜单方式工作。

（2）添加、删除、修改任意个记录。

（3）显示、保存记录。

（4）排序功能：按电话号码排序和按照姓名字母序排序。

（5）查询功能：按人名查询电话号码和按电话号码查询人名。

-The main database, the data include: name, affiliation, phone number, E-mail address. Requires the following functions: (1) system to work the way the menu. 　(2) add, delete, modify any records. (3) shows, record-keeping. (4) sorting: sort by phone number and alphabetical order by name. (5) check function: press inquiries, phone numbers and names by people s names.