From: Spiro Trikaliotis (Spiro.Trikaliotis_at_gmx.de)
Date: 2001-01-03 12:04:37
Hello to all who answered,
> On Tue, Jan 02, 2001 at 07:15:32PM +0100, Spiro Trikaliotis wrote:
> > Forgive me, but if my memory serves me right, C (at least pre-ANSI) does
NOT
> > define the order in which this will be evaluated, so the second part
(c!=62)
> > might be evaluated BEFORE the first part with the assignment, in that
case,
> > this will NOT evaluate to the expected condition.
> That is incorrect. C evaluates boolean expressions as shortcuts with each
> boolean operator being a sequence point. If the left operand is enough to
> determine the value of the expression result, all others will not get
> evaluated. Because of this, one can write things like
Oh yeah, I must admit after reading the C language reference, that my
statement is NOT true. Possibly, it's my fault, because I learned C with
K&R, 1st edition, which is pre-ANSI. In that case, my statement was correct,
anyway, after reading the (ANSI-)C reference ("sequency points"), I must
admit that I'm not correct.
Thank you for answering, as I now know more than before, and can write
programs with much less if()-statements than before... ;-)
Spiro.
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This archive was generated by hypermail 2.1.3 : 2001-12-14 22:05:38 CET