c语言怎么对音频进行采样并存到数组中，能 举个例子嘛

对音频进行采样，可以使用C语言中的音频库，例如PortAudio，将音频输入设定为麦克风或者其他音源，然后通过代码实现采样并存储到数组中。以下是一个简单的例子：

#include <stdio.h>
#include <stdlib.h>
#include "portaudio.h"

#define NUM_SECONDS 5
#define SAMPLE_RATE 44100
#define FRAMES_PER_BUFFER 64
#define NUM_CHANNELS 1
#define DITHER_FLAG 0

typedef struct
{
    float *samples;
    int currentIndex;
}
paTestData;

static paTestData data;

static int recordCallback(const void *inputBuffer, void *outputBuffer,
                          unsigned long framesPerBuffer,
                          const PaStreamCallbackTimeInfo *timeInfo,
                          PaStreamCallbackFlags statusFlags,
                          void *userData )
{
    float *input = (float*)inputBuffer;
    paTestData *data = (paTestData*)userData;
    int i;
    for (i=0; i<framesPerBuffer; i++) {
        data->samples[data->currentIndex++] = *input++;
    }
    return paContinue;
}

int main(int argc, char *argv[])
{
    PaStream *stream;
    PaError err;
    data.samples = (float*)malloc(NUM_SECONDS * SAMPLE_RATE * sizeof(float));
    data.currentIndex = 0;
    err = Pa_Initialize();
    if( err != paNoError ) goto error;
    err = Pa_OpenDefaultStream( &stream,
                                NUM_CHANNELS,
                                0,
                                paFloat32,
                                SAMPLE_RATE,
                                FRAMES_PER_BUFFER,
                                recordCallback,
                                &data );
    if( err != paNoError ) goto error;
    err = Pa_StartStream( stream );
    if( err != paNoError ) goto error;
    printf("\n=== recording ===\n"); fflush(stdout);
    Pa_Sleep(NUM_SECONDS*1000);
    err = Pa_StopStream( stream );
    if( err != paNoError ) goto error;
    err = Pa_CloseStream( stream );
    if( err != paNoError ) goto error;
    Pa_Terminate();
    printf("Finished.\n");
    return 0;
error:
    Pa_Terminate();
    fprintf(stderr, "An error occured while using the portaudio stream\n");
    fprintf(stderr, "Error number: %d\n", err);
    fprintf(stderr, "Error message: %s\n", Pa_GetErrorText(err));
    return -1;
}

这段代码会录制5秒钟的音频，将它存储到一个数组中data.samples，并作为回调函数recordCallback的参数传入。可以根据需要修改参数，例如改变录音时长、采样率等。