Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!zaphod.mps.ohio-state.edu!rpi!leah!bingvaxu!vu0310
From: vu0310@bingvaxu.cc.binghamton.edu (R. Kym Horsell)
Newsgroups: comp.lang.c
Subject: Re: ANSI C questions (parameters, structure assignment)
Message-ID: <3879@bingvaxu.cc.binghamton.edu>
Date: 22 Aug 90 21:59:22 GMT
References: <1081.26d26274@desire.wright.edu>
Reply-To: vu0310@bingvaxu.cc.binghamton.edu.cc.binghamton.edu (R. Kym Horsell)
Organization: SUNY Binghamton, NY
Lines: 25

In article <1081.26d26274@desire.wright.edu> demon@desire.wright.edu writes:
>
>	1)	In standard C, when you pass a structure bigger than four
>longwords, is the structure passed as a value parameter, or just a pointer to
>the structure (thus making it a var parameter)?

I std doesn't care much about 2 bytes, 4 bytes, etc. When you
*ask* for a struct to be passed by value you *get* it otherwise
your code would probably upchuck.

>
>	2)	Are structure assignments allowed only for initializations
>or can I do:
>
>struct_thing = other_struct_thing;

Sure.

>struct_thing -= still_more_struct;
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^?

How should a struct be interpreted as a number (even if it contains only 
a single numeric field)? No, this isn't valid.

-Kym Horsell