说明：  一个通讯录的C控制台程序，特色在于它是命令行方式的，里面有命令行解析的代码。 没有说明，请自行看代码。
(An address book of the C console program, features is that it is a command-line mode, which has a command-line parsing code. Did not say, please look at the code on their own.)