具有图形界面的信息管理系统：

设计一个保存和管理电话号码的具有图形用户界面的应用程序，保存若干人的电话号码到文件中，系统应实现插入、修改、删除、查询等功能。-With a graphical interface of information management systems: design of a conservation and management of telephone numbers with a graphical user interface applications, a number of people to save the phone number to the file, the system should be implemented to insert, modify, delete, query and other functions.