How to write 24 bpp bmp header for height=480 and width=752 using C language

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C

hi every one this code is to write image of 8bpp heigt and width equal to 20*20
actually i want to make this header structure for 24bpp and height =480 and width=752 can any one help me to do this .

#include
unsigned char bitmap[1300];


void BMPmake()
{
int i,noColor=256,end_color=54+4*noColor;
static unsigned char temp=0;
// -- FILE HEADER -- //

// bitmap signature
bitmap[0] = 'B';
bitmap[1] = 'M';

// file size
bitmap[2] = 0xc6; // 40 + 14 + 256*4+400
bitmap[3] = 0x05;
bitmap[4] = 0;
bitmap[5] = 0;

// reserved field (in hex. 00 00 00 00)
for( i = 6; i 400 pixels ,,,, 20x20x1
bitmap[35] = 0x01;//0x190
bitmap[36] = 0;
bitmap[37] = 0;

// horizontal resolution of the image - pixels per meter (2835)
bitmap[38] = 0;
bitmap[39] = 0;
bitmap[40] = 0;
bitmap[41] = 0;

// vertical resolution of the image - pixels per meter (2835)
bitmap[42] = 0;
bitmap[43] = 0;
bitmap[44] = 0;
bitmap[45] = 0;

// color palette information here 256
bitmap[46]=0;
bitmap[47]=1;
for( i = 48; i < 50; i++) bitmap[i] = 0;

// number of important colors
// if 0 then all colors are important
for( i = 50; i < 54; i++) bitmap[i] = 0;

//Color Palette
//for less then or equal to 8 bit BMP Image we have to create a 4*noofcolor size color palette which is nothing but
//[BLUE][GREEN][RED][ZERO] values
//for 8 bit we have the following code
for (i=54;i<end_color;i+=4)
{
bitmap[i]=temp;
bitmap[i+1]=temp;
bitmap[i+2]=temp;
bitmap[i+3]=0;
temp++;
}

// -- PIXEL DATA -- //
for( i = end_color; i < end_color+400; i++) bitmap[i] = 0xff;
}

void BMPwrite()
{
FILE *file;
int i;

//use wb+ when writing to binary file .i.e. in binary form whereas w+ for txt file.
file = fopen("b.bmp", "wb+");
for( i = 0; i < 1478; i++)
{
fputc(bitmap[i], file);
}
fclose(file);
}
void main()
{

BMPmake();
BMPwrite();
printf("Done!!");
}

What I have tried:

i have tried as below code

 #include
   unsigned char bitmap[1300];


void BMPmake()
{
    int i,noColor=256,end_color=54+4*noColor;
    static unsigned char temp=0;
    // -- FILE HEADER -- //

    // bitmap signature
    bitmap[0] = 'B';
    bitmap[1] = 'M';

    // file size
    bitmap[2] = 0xc6; // 40 + 14 + 256*4+400
    bitmap[3] = 0x05;
    bitmap[4] = 0;
    bitmap[5] = 0;

    // reserved field (in hex. 00 00 00 00)
    for( i = 6; i  400 pixels ,,,, 20x20x1
    bitmap[35] = 0x01;//0x190
    bitmap[36] = 0;
    bitmap[37] = 0;

    // horizontal resolution of the image - pixels per meter (2835)
    bitmap[38] = 0;
    bitmap[39] = 0;
    bitmap[40] = 0;
    bitmap[41] = 0;

    // vertical resolution of the image - pixels per meter (2835)
    bitmap[42] = 0;
    bitmap[43] = 0;
    bitmap[44] = 0;
    bitmap[45] = 0;

    // color palette information here 256
    bitmap[46]=0;
    bitmap[47]=1;
    for( i = 48; i < 50; i++) bitmap[i] = 0;

    // number of important colors
    // if 0 then all colors are important
    for( i = 50; i < 54; i++) bitmap[i] = 0;

    //Color Palette
    //for less then or equal to 8 bit BMP Image we have to create a 4*noofcolor size color palette which is nothing but
    //[BLUE][GREEN][RED][ZERO] values
    //for 8 bit we have the following code
    for (i=54;i<end_color;i+=4)
    {
        bitmap[i]=temp;
        bitmap[i+1]=temp;
        bitmap[i+2]=temp;
        bitmap[i+3]=0;
        temp++;
    }

    // -- PIXEL DATA -- //
    for( i = end_color; i < end_color+400; i++) bitmap[i] = 0xff;
}

void BMPwrite()
{
    FILE *file;
    int i;

    //use wb+ when writing to binary file .i.e. in binary form whereas w+ for txt file.
    file = fopen("b.bmp", "wb+");
    for( i = 0; i < 1478; i++)
    {
        fputc(bitmap[i], file);
    }
    fclose(file);
}
void main()
{

    BMPmake();
    BMPwrite();
    printf("Done!!");
}