From: cberry AT cinenet DOT net (Craig Berry)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Questions
Date: 6 Oct 1997 20:55:31 GMT
Organization: Cinenet Communications,Internet Access,Los Angeles;310-301-4500
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References: <343927E9 DOT CFEE68C0 AT worldonline DOT nl>
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To: djgpp AT delorie DOT com
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Reinier Heeres (rwh AT worldonline DOT nl) wrote:
: I have 2 questions:
: -When does a floating point exception occur, I seem to get them every
: other time I run my little 3D object viewer...

The most common cause is division by zero.  Check for cases in your code 
where these might occur and find a way around them.

: -Is the 'char' type in DJGPP the same as an 'int'? It seems to take 4
: bytes in my structure, and if so, isn't there a type that defines 1 byte
: (a 'char' in borland C)

Answer 1: No, it's not the same as int, it's a char.
Answer 2: In DJGPP, sizeof(int) = 4, sizeof(char) = 1.  The latter
          is always true by definition, I believe.
Answer 3: DJGPP will by default optimize your struct layout so that
          fields begin on even byte boundaries.  This can leave
          'dead space' in your structs.  Look up 'struct packing'
          if you want to defeat this, but be careful -- the memory
          savings carry a performance penalty, and can cause lib
          compatibility problems.

Hope this helps!

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