于 2013年11月07日 21:07, Fabio Estevam 写道: > Why buffer[FINGERPRINT_LEN + 1] instead of buffer[FINGERPRINT_LEN] ? just for the safe guard. "+1" is to simulate the terminal '\0' of the string. Of course, it's ok to use the buffer[FINGERPINGT_LEN]. thanks Huang Shijie