通讯录，管理联系人的信息，实现联系人的创建，按条件删除，修改，等功能-Contacts, manage contact information, to achieve the creation of contacts, according to the conditions delete, modify, etc.

编程的一个小程序，通讯录主要是，大家可以看看其中的的内容，有什么不懂可以联系我-Programming a small program, mainly contacts, we can look at the content, what I do not understand you can contact