这是一个简单的网络编程例子，用于初学者做实验的，目的是获取自己主机的名字，以及通过自己的电脑名字或得自己电脑的IP地址-This is a simple example of network programming for beginners to experiment, the purpose is to get its own host name, as well as through their computer name or IP address of their computer t