如何使用WAVEFORMATEX编写.wav文件

我写了一个程序，打开wav文件并通过控制台播放它们，然后修改声音并重放。我如何保存一个新的wav文件与修改的声音?所以本质上我想创建一个wav文件并将修改后的结果写入其中。我使用WAVEFORMATEX作为音频的数据。

我做了更多的工作，我得到了wav文件创建，但它不能播放

// writes the modified audio data into a .WAV file
void writeWaveFile(char* filename,WAVEFORMATEX& wfx)
{   
    FILE* file = fopen(filename, "wb");
    if (file)
    {
        // write wave header 
        unsigned short formatType = wfx.wFormatTag;
        unsigned short numChannels = wfx.nChannels;
        unsigned long  sampleRate = wfx.nSamplesPerSec;
        unsigned short bitsPerChannel = wfx.wBitsPerSample;
        unsigned short bytesPerSample = wfx.nAvgBytesPerSec;
        unsigned long  bytesPerSecond = wfx.nAvgBytesPerSec;
        unsigned long  dataLen = wfx.nBlockAlign;
        const int fmtChunkLen = 16;
        const int waveHeaderLen = 4 + 8 + fmtChunkLen + 8;
        unsigned long totalLen = waveHeaderLen + dataLen;
        fwrite("RIFF", 4, 1, file);
        fwrite(&totalLen, 4, 1, file);
        fwrite("WAVE", 4, 1, file);
        fwrite("fmt ", 4, 1, file);
        fwrite(&fmtChunkLen, 4, 1, file);
        fwrite(&formatType, 2, 1, file);
        fwrite(&numChannels, 2, 1, file);
        fwrite(&sampleRate, 4, 1, file);
        fwrite(&bytesPerSecond, 4, 1, file);
        fwrite(&bytesPerSample, 2, 1, file);
        fwrite(&bitsPerChannel, 2, 1, file);
        // write data
        fwrite("data", 4, 1, file);
        fwrite(&dataLen, 4, 1, file);
        //fwrite(data, dataLen, 1, file);
        // finish
        printf("Saved audio as %sn", filename);
        fclose(file);
    }
    else
        printf("Could not open %s to write audio datan", filename);
}