Re: C again
Re: C again
- Subject: Re: C again
- From: Jens Bjerrehuus <email@hidden>
- Date: Sun, 31 Aug 2003 09:46:47 +0200
sxndag 31. aug 2003 kl. 01:57 skrev David Thorp:
while (((ch = PEEK (myFile)) != EOF) && (error = 0))
The problem is error = 0 does not say is error equal to 0 but set
error to zero.
Oh Duh! Of course. Thanks.
You could get the compiler to help you see at least some of these kinds
of errors. But, it would require you to stop using all those unneeded
parentheses. :)
If you had written the expression like this:
while ((ch = getc (myFile)) != EOF && error = 0)
(which would be correct if the assignment was an equal-to instead) you
would get an error like this:
klonk.c:9: invalid lvalue in assignment
I won't claim that this immediately points out the problem, but it at
least would make you aware that there indeed is a problem here.
Namely, the problem that && (and) has higher precedence than =
(assignment). And, that the solution to that problem would be
parentheses around the assignment (if you indeed wanted the assignment
here) or to replace the assignment operator with the equal-to operator.
Kind regards
Jens
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| | >Re: C again (From: David Thorp <email@hidden>) |