From: Eli Zaretskii <eliz AT is DOT elta DOT co DOT il>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Pointer/array understanding?
Date: Sat, 06 Oct 2001 19:56:40 +0200
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To: djgpp AT delorie DOT com
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pouzzler wrote:
> 
>         for(int i=0; i<bitmap.bmih.biClrUsed; i++)
>                 {
>                 _read(hbitmap, &bitmap.bmiColors[i].rgbBlue, 1);
>                 _read(hbitmap, &bitmap.bmiColors[i].rgbGreen, 1);
>                 _read(hbitmap, &bitmap.bmiColors[i].rgbRed, 1);
>                 _read(hbitmap, &bitmap.bmiColors[i].rgbReserved, 1);
>                 }
> 
>     _close(hbitmap);    //closing the file
>         }
> 
> It crashes when reading in RGBQUAD *bmiColors
> 
> But only with djgpp - compiling and running it using VC++ works fine.
> 
> Does anyone know why?

Because you didn't allocate the storage where bitmap.bmiColors[] point?

The fact that MSVC-compiled program works doesn't mean anything--except,
perhaps, that DJGPP has a better run-time diagnostics.