The following classes, CRecordSound and CPlaySound, record sound and play PCM sound simultaneously. An example dialog-based program is provided that records, saves to disk and then echos sound. This example also contains two more classes, CWriteSound

客户机（client_record.c）负责采集音频，并通过socket发送给服务器。 服务器（wav_serv.c）接收音频数据后，加上wav头信息，生成wav的声音文件。-The client (client_record.c) is responsible for collecting audio, and sent to the server through socket. Server (wav_serv.c) after receiving the audio data,