客户端可以向服务器发送信息，服务器接收信息，并自动返回相同的信息给客户端（自动回复），若要实现双向通信只需在服务器的源程序中将gets(DataBuffer)的语句恢复即可-The client can send a message to the server, the server receives the information, and automatically return information to the client the same (auto reply), if only in the gets source code, server to achieve two-way communication (DataBuffer) statement to restore