From: "Jon Bills" <jon_bills AT hotmail DOT com>
Newsgroups: comp.lang.c++,comp.os.msdos.djgpp
Subject: Re: Holes in structure
Date: Tue, 6 Nov 2001 15:13:43 +0000 (UTC)
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"Hans-Bernhard Broeker" <broeker AT physik DOT rwth-aachen DOT de> wrote in message
news:9s8o2d$nl6$1 AT nets3 DOT rz DOT RWTH-Aachen DOT DE...

> [Crossposted without a proper F'up2 --- I restricted it to one group
> as it should be]
> 
> In comp.os.msdos.djgpp Alex Vinokur <alexvn AT bigfoot DOT com> wrote:
> 
[snip]
> > Questions.
> >  1. struct type0 (empty) :
> >            Why is 'sizeof' = 1?
> 
> Why not?  An empty struct is a completely useless thing --- what on
> earth would you care about its size for?
> 
[snip]

It's not a completely useless thing in C++ - check out the x-posting. An
empty struct (or class) has a size greater than zero so that it can have
a distinct address. This allows arrays of objects with no data members to
be created.

Jon.



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