简易版的基于UDP的linux下的聊天程序，纯C语言，直接GCC编译运行，默认是本地IP，若要与另一台机器通信改下对应IP即可，适合初学者-Simple version of the Linux based UDP chat program, pure C language, GCC compiler directly run, the default is the local IP, if you want to communicate with another machine to chan