Save a bmp image from C++

//Implemented by: http://www.youtube.com/user/thecplusplusguy
//pure C++, compile, run, and it creates a bmp image (in the same folder, where the executable is), just as a siple demonstration
#include <iostream>
#include <fstream>
#include <cstdlib>
#include <ctime>
using namespace std;

struct bmpfile_magic {
  unsigned char magic[2];
};

struct bmpfile_header {
  int filesz;
  short creator1;
  short creator2;
  int bmp_offset;
};

typedef struct {
  int header_sz;
  int width;
  int height;
  short nplanes;
  short bitspp;
  int compress_type;
  int bmp_bytesz;
  int hres;
  int vres;
  int ncolors;
  int nimpcolors;
} BITMAPINFOHEADER;

const int WIDTH=1023;
const int HEIGHT=1023;
const int BPP=32;

int main()
{
    srand(time(0));
    std::ofstream out("ki.bmp",std::ios::binary);
    bmpfile_magic bm={'B','M'};
    bmpfile_header bh={54+((BPP*WIDTH)/8)*HEIGHT,0,0,54};
    BITMAPINFOHEADER bhi={40,WIDTH,HEIGHT,1,BPP,0,((BPP*WIDTH)/8)*HEIGHT,2750,2750,0,0};
    out.write((char*)&bm,sizeof(bm));
    out.write((char*)&bh,sizeof(bh));
    out.write((char*)&bhi,sizeof(bhi));
    for(int i=0;i<HEIGHT;i++)
        for(int j=0;j<WIDTH;j++)
        {
                out.put((char)(i/4));
                out.put((char)(j/4));
                out.put((char)((i+j)/8));
                out.put((char)0);
        }

    return 0;
}