Is FALSE == 0?

[Tatu Portin]

Is FALSE == 0?
In other words, does 'function ()' execute on all platforms:

if ( (1 == 2) == 0 )
function ();

if ( (7!) == 0 )
function ();

I would like if you could point to some definition of the c language.

[Trent Buck]

Quoth Tatu Portin on or about 2004-11-20:

Is FALSE == 0?
In other words, does 'function ()' execute on all platforms:

I asked a similar question recently. Here's the google archive
http://www.google.com/groups?selm=cn...s.uwaterloo.ca

-trent

[Tatu Portin]

Trent Buck wrote:

Quoth Tatu Portin on or about 2004-11-20:

Is FALSE == 0?
In other words, does 'function ()' execute on all platforms:

I asked a similar question recently. Here's the google archive
http://www.google.com/groups?selm=cn...s.uwaterloo.ca

-trent

From
http://www.google.com/groups?selm=cn...s.uwaterloo.caAll operators that return a boolean result are defined to return 0 or
1, so you can do this, or at least could if you didn't mind inverting
the result.

"Are defined to return 0 or 1", but does not say whetever 0 is false or not.
Also, I would like if one could point some place in standard (C89, C99) where
it defines these values.

[Goran Larsson]

In article <3h************ **@read3.inet.f i>,
Tatu Portin <ax****@mbnet.f i> wrote:

Is FALSE == 0?
Yes.
if ( (1 == 2) == 0 )
function ();
Yes.
if ( (7!) == 0 )
function ();
No, this will not compile.

| if ( (!7) == 0 )
| function ();

Yes.
I would like if you could point to some definition of the c language.

The ANSI/ISO/IEC 9899-1999 standard.

--
Göran Larsson http://www.mitt-eget.com/

[Tatu Portin]

Goran Larsson wrote:

In article <3h************ **@read3.inet.f i>,
Tatu Portin <ax****@mbnet.f i> wrote:

Is FALSE == 0?

Yes.

if ( (1 == 2) == 0 )
function ();

Yes.

if ( (7!) == 0 )
function ();

No, this will not compile.

| if ( (!7) == 0 )
| function ();

Yes.

I would like if you could point to some definition of the c language.

The ANSI/ISO/IEC 9899-1999 standard.

Thanks. Just if you could give some www-adress for reference.

[Michael Mair]

Tatu Portin wrote:

Goran Larsson wrote:

Tatu Portin <ax****@mbnet.f i> wrote:

I would like if you could point to some definition of the c
language.

The ANSI/ISO/IEC 9899-1999 standard.

Thanks. Just if you could give some www-adress for reference.

The standard is available for about 270 USD as paper copy or from
webstore.ansi.o rg for 18 USD as .pdf file.
(
http://webstore.ansi.org/ansidocstor...EC+9899%2D1999
)

For most beginners, N869, the last public (and freely available) draft
is quite enough. Use google to obtain it.

Cheers
Michael
--
E-Mail: Mine is an /at/ gmx /dot/ de address.

[Minti]

Tatu Portin wrote:

Goran Larsson wrote:

In article <3h************ **@read3.inet.f i>,
Tatu Portin <ax****@mbnet.f i> wrote:

Is FALSE == 0?

Yes.

if ( (1 == 2) == 0 )
function ();

Yes.

if ( (7!) == 0 )
function ();

No, this will not compile.

| if ( (!7) == 0 )
| function ();

Yes.

I would like if you could point to some definition of the c language.

The ANSI/ISO/IEC 9899-1999 standard.

Thanks. Just if you could give some www-adress for reference.

I believe your c-book whichever it is should be able to answer this
question.
If it does not maybe you need another book.

--
Imanpreet Singh Arora

[Keith Thompson]

Michael Mair <Mi**********@i nvalid.invalid> writes:
[...]

The standard is available for about 270 USD as paper copy or from
webstore.ansi.o rg for 18 USD as .pdf file.
(
http://webstore.ansi.org/ansidocstor...EC+9899%2D1999
)

For most beginners, N869, the last public (and freely available) draft
is quite enough. Use google to obtain it.

For most beginners, a good book is going to be much more useful than a
copy of the standard. K&R2 is one of the best (_The C Programming
Language_, 2nd Edition, by Kernighan & Ritchie).

--
Keith Thompson (The_Other_Keit h) ks***@mib.org <http://www.ghoti.net/~kst>
San Diego Supercomputer Center <*> <http://users.sdsc.edu/~kst>
We must do something. This is something. Therefore, we must do this.

[Keith Thompson]

Tatu Portin <ax****@mbnet.f i> writes:

Is FALSE == 0?
In other words, does 'function ()' execute on all platforms:

if ( (1 == 2) == 0 )
function ();

if ( (7!) == 0 )
function ();

I would like if you could point to some definition of the c language.

Read section 9 of the C FAQ, <http://www.eskimo.com/~scs/C-faq/top.html>.
(If you forget the URL, just google "C FAQ".)

--
Keith Thompson (The_Other_Keit h) ks***@mib.org <http://www.ghoti.net/~kst>
San Diego Supercomputer Center <*> <http://users.sdsc.edu/~kst>
We must do something. This is something. Therefore, we must do this.

[Michael Mair]

Hi Keith,

Keith Thompson wrote:

Michael Mair <Mi**********@i nvalid.invalid> writes:
[...]

The standard is available for about 270 USD as paper copy or from
webstore.ansi .org for 18 USD as .pdf file.
(
http://webstore.ansi.org/ansidocstor...EC+9899%2D1999
)

For most beginners, N869, the last public (and freely available) draft
is quite enough. Use google to obtain it.

For most beginners, a good book is going to be much more useful than a
copy of the standard. K&R2 is one of the best (_The C Programming
Language_, 2nd Edition, by Kernighan & Ritchie).

Mind the "quite" :-)
The OP asked for the standard, I gave the answer.
He can have a look at N869 and see and believe that going back to
"ordinary" C books might be a better idea. Sometimes, you have to
do it for yourself...
Apart from K&R2, I also always refer the people to the c.l.c FAQ.
Cheers
Michael
--
E-Mail: Mine is an /at/ gmx /dot/ de address.