该通讯录可以实现查找、修改、删除、排序和添加的功能。同时会把所有的通讯记录保存到文件中（文件以二进制的形式记录最新的内容）。其中文件保存功能可以记录该通讯录的动态信息。在通讯录界面上做的任何修改都会反应到文件中。-The contacts can be achieved to find, modify, delete, sort, and add features. At the same time will save all the communication records to a file (file with binary contents of the latest form of recording). One file function can record the dynamic information in the address book. In the Address Book interface reaction, any change made to the file.