TC运行下面语句过不去，咋回事？请教各位

/* 将音频流指针转换成线性地址 */
LinearAddress = FP_SEG(Wav_file->sample);   /*求段地址。这句过不去*/
LinearAddress = (LinearAddress << 4) + FP_OFF(Wav_file->sample);/*求偏移地址*/