Date: Fri, 30 May 1997 12:20:10 -0500 (CDT) From: Richard Neswold <neswold@aduxb.fnal.gov> To: Thomas David Rivers <ponds!rivers@dg-rtp.dg.com> Cc: FreeBSD-Hackers <hackers@hub.freebsd.org> Subject: Re: cc/gcc Message-ID: <Pine.GSO.3.95.970530121029.21648A-100000@aduxb.fnal.gov> In-Reply-To: <199705301200.IAA11334@lakes.water.net>
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On Fri, 30 May 1997, Thomas David Rivers wrote:
> I believe '?' has a higher precedence than '=='; so you are really
> saying:
Nope. "==" has higher precedence than "?:". Furthermore, '==' is
left-to-right associative.
> > a = 1; b = 1; c = 0;
> > c = a == b == 1 ? 1 : 0 ; printf(" %i\n", c);
Using parenthesis to indicate the precedence:
c = (((a == b) == 1) ? 1 : 0);
(( 1 == 1) ? 1 : 0);
( 1 ? 1 : 0);
1;
> > a='1'; b='1'; c = 0;
> > c = a == b == '1' ? '1' : '0'; printf(" %c\n", c);
c = (((a == b) == '1') ? '1' : '0');
(( 1 == '1') ? '1' : '0');
( 0 ? '1' : '0');
'0';
Rich
------------------------------------------------------------------------
Richard Neswold, Accelerator Div./Controls Dept | neswold@fnal.gov
Fermilab, PO Box 500, MS 347, Batavia, IL 60510 | voice (630) 840-3454
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