3.进入server目录进行编译：
$ cd server
$ $CC server.c -o server.out
测试：
1.把可执行文件server.out移植到开发板中
2.运行：
$./server.out
3.在虚拟机中client目录运行：
$./client 192.168.137.81(开发板ip地址)
4.可在开发板中接收到数据：
OK: Obtain Socket Despcritor sucessfully.
OK: Bind the Port 5000 sucessfully.
OK: Listening the Port 5000 sucessfully.
OK: Server has got connect from 192.168.137.83.
You can enter string, and press 'exit' to end the connect.
5.在开发板中输入字符，可在虚拟机中接收到：
You can enter string, and press 'exit' to end the connect.
www.myzr.com
OK: Sent 12 bytes sucessful, please enter again.