大家给看看这个程序

C/C++ code

#include <unistd.h>#include <fcntl.h>#include <sys/types.h>#include <sys/ioctl.h>#include <stdlib.h>#include <stdio.h>#include <linux/soundcard.h>#define LENGTH 3    /* 存储秒数 */#define RATE 22050   /* 采样频率 */#define SIZE 8      /* 量化位数 */#define CHANNELS 1  /* 声道数目 *//* 用于保存数字音频数据的内存缓冲区 */unsigned char buf[LENGTH*RATE*SIZE*CHANNELS/8];int openDsp(int rd){    int fd; /* 声音设备的文件描述符 */    int arg; /* 用于ioctl调用的参数 */    int status;   /* 系统调用的返回值 */    /* 打开声音设备 */    if(rd==0)      fd= open("/dev/dsp",O_RDONLY);    else      fd= open("/dev/dsp",O_WRONLY);    if (fd < 0) {        perror("open of /dev/dsp failed");        exit(1);    }    /* 设置采样时的量化位数 */    arg = SIZE;    status = ioctl(fd, SOUND_PCM_WRITE_BITS, &arg);    if (status == -1)      perror("SOUND_PCM_WRITE_BITS ioctl failed");    if (arg != SIZE)      perror("unable to set sample size");      /* 设置采样时的量化位数 */    arg = SIZE;    status = ioctl(fd, SOUND_PCM_WRITE_BITS, &arg);    if (status == -1)      perror("SOUND_PCM_WRITE_BITS ioctl failed");    if (arg != SIZE)      perror("unable to set sample size");    /* 设置采样时的声道数目 */    arg = CHANNELS;    status = ioctl(fd, SOUND_PCM_WRITE_CHANNELS, &arg);    if (status == -1)      perror("SOUND_PCM_WRITE_CHANNELS ioctl failed");    if (arg != CHANNELS)      perror("unable to set number of channels");    /* 设置采样时的采样频率 */    arg = RATE;    status = ioctl(fd, SOUND_PCM_WRITE_RATE, &arg);    if (status == -1)      perror("SOUND_PCM_WRITE_WRITE ioctl failed");    return fd;}int main(){    int status;    /* 循环，直到按下Control-C */    while (1) {        memset(buf,0,sizeof(buf));        int fdread=openDsp(0);        printf("Say something:\n");        status = read(fdread, buf, sizeof(buf)); /* 录音 */        if (status != sizeof(buf))          perror("read wrong number of bytes");        status=close(fdread);        if(status==-1){          perror("close Read Dsp wrong");          exit(1);        }        int fdwrite=openDsp(1);        printf("You said:\n");        status = write(fdwrite, buf, sizeof(buf)); /* 回放 */        if (status != sizeof(buf))          perror("wrote wrong number of bytes");        /* 在继续录音前等待回放结束 */        status = ioctl(fdwrite, SOUND_PCM_SYNC, 0);        if (status == -1)          perror("SOUND_PCM_SYNC ioctl failed");        status=close(fdwrite);        if(status==-1){          perror("rclose Write Dsp wrong");          exit(1);        }    }    return 0;}

程序没有错误，但为什么录音之后方步出来呢，是怎么回事？
我用的ubuntu系统

[解决办法]
放不出来，有报错吗？如果有的话，帖出错误来!
[解决办法]
虽然很浅，但我还是想问，你确定你的录音设备是好的吗？在测试这个程序前你用其他软件测试过硬件吗？

很久以前，我在调试一热敏打印机驱动程序时，咋都打不出来，程序也没错，耗了一天，最后发现。。。
串口线掉了一针脚