ckongzhi

代码说明：

说明：   思想：控制端向服务器端发送一段控制代码，6位的控制代码，服务器根据控制码的要求，完成指定操作。完成操作后，服务器发送反馈控制码，为3位。 服务器端程序后台运行(Thought: Control client to the server-side send a control code, control code 6, the server control code in accordance with the requirements of the completion of the specified operation. After the completion of the operation, the server code to send feedback control for three. Server-side program running in the background)