这是一个完整的应用程序。它存储各种信息到一个文件中关于多个联系人,添加程序内部。您可以添加新的联系人,编辑现有的联系人,删除联系人。-This is a complete application. It stores a variety of information to a file on multiple contacts, add internal procedures. You can add new contacts, edit existing contacts, delete contacts.