说明：  一个用VC做开发平台，用C语言开发的简单电话查询系统，具有添加记录，修改记录，删除记录，查找记录等功能.能帮助了解文件操作。
(a VC with development platform, with C-language development simple telephone inquiry system, with added records, change records, delete records, the records search function. To help understand the operating document.)