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Mail Archives: djgpp/1998/09/08/16:31:51

From: Erik Max Francis <max AT alcyone DOT com>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: how do i define structures ?
Date: Tue, 08 Sep 1998 13:10:42 -0700
Organization: Alcyone Systems
Lines: 36
Message-ID: <35F58F42.6D71B0B5@alcyone.com>
References: <000101bdd8ea$aa4d9540$5d4d08c3 AT arthur>
NNTP-Posting-Host: charmaine.alcyone.com
Mime-Version: 1.0
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

Arthur wrote:

> Do you actually need the last mystruct? Perhaps I've been using C++
> for too
> long (where you don't even need typedef), ...

Well, typedef certainly still exists, but isn't necessary when defining
structs, classes, and unions.

> ... but I thought that you could
> define a typedef'd structure thus:
> 
> typedef structs mystruct {
>     int x;
>     int y;
> }

This is illegal.  You meant

    typedef struct {
        int x, y;
    } mystruct;

This declares an anonymous struct (one with no tag), and typedefs it to
be mystruct.  The usual way that typedefs are used with structurs
declares both a tag (e.g., struct X) and the type by itself (e.g., X). 
The typedefs are unnecessary in C++, but also do not do any harm.

-- 
Erik Max Francis / email max AT alcyone DOT com / whois mf303 / icq 16063900 
Alcyone Systems / irc maxxon (efnet) / finger max AT sade DOT alcyone DOT com
  San Jose, CA / languages En, Eo / web http://www.alcyone.com/max/
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           / (an English proverb)

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