MESSAGE
| DATE | 2002-04-24 |
| FROM | Ruben I Safir
|
| SUBJECT | Re: [hangout] C problem
|
This is realy strange. On SCO, any return value less than or equal to zero
is a false.
Ruben
On 2002.04.24 13:27 Jon Bober wrote:
>
> The value -1 results in "true." The only value that results in "false"
> is 0.
>
> The C statement:
> if(x)
>
> is something similar to the assembler statement
> cmp 0, x
>
> Basically, if(x) means if(x!=0)
>
>
> On Wed, Apr 24, 2002 at 09:59:29AM -0400, Ruben I Safir wrote:
> >
> > Yes
> >
> > That's right, but it still doesn't work and I'm not
> > sure why. When you send CTL D the scanf returns a -1, which I asume is the
> > EOF result, and the if statement doesn't break.
> >
> >
> > This is why I use Perl
> >
> >
> > Ruben
> >
> > > Wow. I feel really stupid. I don't know how that happened. I guess I
> > > was looking at the warnings.
> > >
> > > I think that the problem is one of operator precedence. try:
> > > if (!(ret=scanf("%255s", buff_key)))
> > >
> > > I just tested the two lines
> > > z = (!y=x);
> > >
> > > and
> > > z = (!(y=x));
> > >
> > > The latter works but not the former. The first is trying to assign the
> > > value x to !y
> > >
> > > On Wed, 24 Apr 2002 01:20:19 -0400 (EDT)
> > > Ruben I Safir wrote:
> > >
> > > >
> > > > > First, what is g_hash_table_new(), if those warnings are important
> > > > > to you?
> > > > >
> > > >
> > > > ITs a gtk function which has nothing to do with the problem
> > > >
> > > >
> > > > > Second, hTable must be declared
> > > >
> > > >
> > > > Yahah yadah - it's declared above main where it belongs
> > > >
> > > > The error is the lvalue
> > > > int ret and scanf
> > > >
> > > > THIS is the line which is the problem
> > > >
> > > > > > if(! ret=scanf("%255s", buff_key)) break; <====LINE 35
> > > > > > hash.c:35: invalid
> > > > > > lvalue in assignment
> > > > > >
> > > > > > --
> > > > > > __________________________
> > > > > >
> > > > > > Brooklyn Linux Solutions
> > > > > > __________________________
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> > > > > > http://www.nylxs.com - Leadership Development in Free Software
> > > > > > http://www.nyfairuse.org - The foundation of Democracy
> > > > > > http://www2.mrbrklyn.com/resources - Unpublished Archive or
> > > > > > stories and articles from around the net
> > > > > > http://www2.mrbrklyn.com/mp3/dr.mp3 - Imagine my surprise when I
> > > > > > saw you... http://www2.mrbrklyn.com/downtown.html - See the New
> > > > > > Downtown Brooklyn....
> > > > > >
> > > > > > 1-718-382-5752
> > > > > >
> > > > > >
> > > > > >
> > > > > > ____________________________
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> > > > > > Fair Use -
> > > > > > because it's either fair use or useless....
> > > > >
> > > >
> > > > ____________________________
> > > > New Yorker Linux Users Scene
> > > > Fair Use -
> > > > because it's either fair use or useless....
> > >
> >
> > ____________________________
> > New Yorker Linux Users Scene
> > Fair Use -
> > because it's either fair use or useless....
> ____________________________
> New Yorker Linux Users Scene
> Fair Use -
> because it's either fair use or useless....
>
--
__________________________
Brooklyn Linux Solutions
__________________________
http://www.mrbrklyn.com - Consulting
http://www.brooklynonline.com - For the love of Brooklyn
http://www.nylxs.com - Leadership Development in Free Software
http://www.nyfairuse.org - The foundation of Democracy
http://www2.mrbrklyn.com/resources - Unpublished Archive or stories and articles from around the net
http://www2.mrbrklyn.com/mp3/dr.mp3 - Imagine my surprise when I saw you...
http://www2.mrbrklyn.com/downtown.html - See the New Downtown Brooklyn....
1-718-382-5752
____________________________
New Yorker Linux Users Scene
Fair Use -
because it's either fair use or useless....
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