说明：  Wav文件操作类，包括音频文件打开，读写、关闭、编码转换、音频播放。本代码采用VC++2010编写，使用方法是创建MFC项目，将压缩文件包中两个文件加入，包含.h文件即可创建对象，对wav文件进行操作。
(The open the Wav file operation class, including audio files, read and write, close, transcoding, audio playback. The code to adopt VC++2010 written to use the MFC project will create two files in the compressed file package added, contains h file to create an object, operate the wav file.)