在C中编写BMP文件的麻烦

Question

我正在努力输入BMP，然后操纵我的2D像素阵列中的几乎每个像素，并将其存储在数组2D pixelarrayout中（在下面的最终代码段中的第一个嵌套for循环内部）。我觉得输出的BMP应该是正常的，当通过Hex编辑器查看文件时，一切似乎都没问题，但由于某种原因，文件无法正常打开。有什么想法吗？可能是标题中的错误，但每个文件的前54个字节（两个标题的大小）是相同的

//make an instance of all output structure

    HEADER dataoutput;
    INFOHEADER data2output;
    char pixeloutput[pixelnum];

    int pixcount=0;
    for(r=0; r<rows; r++){
        for(c=0; c<collumns;c++){
            pixeloutput[pixcount]=pixelarrayout[r][c].Red;
            pixcount++;
        }
    }
    dataoutput.Type = data.Type;
    dataoutput.Size = data.Size;
    dataoutput.Reserved1 = data.Reserved1;
    dataoutput.Reserved2 = data.Reserved2;
    dataoutput.Offset = data.Offset;

    data2output.Size = data2.Size;
    data2output.Width = data2.Width;
    data2output.Height = data2.Height;
    data2output.Planes = data2.Planes;
    data2output.Bits = data2.Bits;
    data2output.Compression = data2.Compression;
    data2output.ImageSize = data2.ImageSize;
    data2output.xResolution = data2.xResolution;
    data2output.yResolution = data2.yResolution;
    data2output.Colors = 0;
    data2output.ImportantColors = 0;

    if( !(fileout = fopen( "CUoutput4.bmp","wb")))return  0;
    //calloc an array of 16 bytes set to NULL to be used to pad the end of the file 
    char *nullarray;
    nullarray = (char*) calloc(16,sizeof(char));

    fwrite(&dataoutput,sizeof(HEADER),1,fileout);
    fwrite(&data2output,sizeof(INFOHEADER),1,fileout);
    int i;
    char *pixelvaluehold;
    for(i=0;i<pixelnum;i++){
        pixelvaluehold = &pixeloutput[i];
        fwrite(pixelvaluehold,sizeof(char),1,fileout);
    }
    int count=0;
    while(( count + sizeof(HEADER) + sizeof(INFOHEADER) + pixelnum * sizeof(PIXEL) ) % 16 != 0){
        fwrite(nullarray,sizeof(char),1,fileout);
        count++;
    }

    fclose(file);
    fclose(fileout);

    free(pixelarray);   
    free(pixelarrayout);

以下是HEADER，INFOHEADER和PIXEL的结构

//define structures
    typedef struct 
    {   unsigned short int Type; /* Magic identifier */
        unsigned int Size; /* File size in bytes */
        unsigned short int Reserved1, Reserved2;
        unsigned int Offset; /* Offset to data (in B)*/
    }HEADER; /* -- 14 Bytes -- */

    typedef struct 
    {   unsigned int Size; /* Header size in bytes */
        unsigned int Width, Height; /* Width / Height of image */
        unsigned short int Planes; /* Number of colour planes */
        unsigned short int Bits; /* Bits per pixel */
        unsigned int Compression; /* Compression type */
        unsigned int ImageSize; /* Image size in bytes */
        int xResolution, yResolution;/* Pixels per meter */
        unsigned int Colors; /* Number of colors */
        unsigned int ImportantColors;/* Important colors */
    }INFOHEADER; /* -- 40 Bytes -- */

//restor original stack allignment  
#pragma pack(pop)

typedef struct
{ unsigned char Red, Blue, Green;
}PIXEL;