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I love relational operators so much
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Andrey Vul  
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 More options 8 Nov, 01:08
Newsgroups: comp.lang.c
From: Andrey Vul <andrey....@gmail.com>
Date: Sat, 7 Nov 2009 17:08:32 -0800 (PST)
Local: Sun 8 Nov 2009 01:08
Subject: I love relational operators so much
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C's handling of 'if' leads to a lot of room for obfuscation. All you
have to do is replace ';' with '|' for compound expressions and add
parentheses as neccessary.
if (x)
 y;
else
 z;
becomes
((x)&&(y))
||(z);

for compounds,
if (x)
 y;z;a;b;
else
 c;d;e;f;
becomes
((x) && ((y)|(z)|(a)|(b))
||((c)|(d)|(e)|(f));

C is so much fun to obfuscate. Gotta love ISO 9899.
The result is still more readable than perl, though.


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Andrey Vul  
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 More options 8 Nov, 01:13
Newsgroups: comp.lang.c
From: Andrey Vul <andrey....@gmail.com>
Date: Sat, 7 Nov 2009 17:13:44 -0800 (PST)
Local: Sun 8 Nov 2009 01:13
Subject: Re: I love relational operators so much
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On Nov 7, 8:08 pm, Andrey Vul <andrey....@gmail.com> wrote:

Uh oh, | isn't gonna work on for- or while-loops.

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Andrey Vul  
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 More options 8 Nov, 01:14
Newsgroups: comp.lang.c
From: Andrey Vul <andrey....@gmail.com>
Date: Sat, 7 Nov 2009 17:14:58 -0800 (PST)
Local: Sun 8 Nov 2009 01:14
Subject: Re: I love relational operators so much
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On Nov 7, 8:13 pm, Andrey Vul <andrey....@gmail.com> wrote:

> Uh oh, | isn't gonna work on for- or while-loops.

But it does work for pure-sequentials e.g., do{ ... }while(0), etc.

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Andrey Vul  
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 More options 8 Nov, 01:21
Newsgroups: comp.lang.c
From: Andrey Vul <andrey....@gmail.com>
Date: Sat, 7 Nov 2009 17:21:20 -0800 (PST)
Local: Sun 8 Nov 2009 01:21
Subject: Re: I love relational operators so much
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On Nov 7, 8:13 pm, Andrey Vul <andrey....@gmail.com> wrote:

> Uh oh, | isn't gonna work on for- or while-loops.

and void()s

but void() => int() by changing return to return 0


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Eric Sosman  
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 More options 8 Nov, 13:33
Newsgroups: comp.lang.c
From: Eric Sosman <esos...@ieee-dot-org.invalid>
Date: Sun, 08 Nov 2009 08:33:24 -0500
Local: Sun 8 Nov 2009 13:33
Subject: Re: I love relational operators so much
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Andrey Vul wrote:
> C's handling of 'if' leads to a lot of room for obfuscation. All you
> have to do is replace ';' with '|' for compound expressions and add
> parentheses as neccessary.
> if (x)
>  y;
> else
>  z;
> becomes
> ((x)&&(y))
> ||(z);

     I tried your suggestion, with `exit(0)' for `z', and
my compiler complained.  Should I sue the vendor?

> for compounds,
> if (x)
>  y;z;a;b;
> else
>  c;d;e;f;

     ... is a syntax error.

--
Eric Sosman
esos...@ieee-dot-org.invalid


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Richard Bos  
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 More options 9 Nov, 16:23
Newsgroups: comp.lang.c
From: ralt...@xs4all.nl (Richard Bos)
Date: Mon, 09 Nov 2009 16:23:14 GMT
Local: Mon 9 Nov 2009 16:23
Subject: Re: I love relational operators so much
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Beej Jorgensen <b...@beej.us> wrote:
> Eric Sosman  <esos...@ieee-dot-org.invalid> wrote:
> >     I tried your suggestion, with `exit(0)' for `z', and
> >my compiler complained.  Should I sue the vendor?

> vendor==MICROSOFT && printf("Sue Sue!\n");  // ;-)

You surprise me. I'd expect a M$-written implementation, if it started
emitting girls' names, to choose "Daisy, Daisy...".

Richard


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dSpam@arcor.de  
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 More options 10 Nov, 13:51
Newsgroups: comp.lang.c
From: "dS...@arcor.de" <dS...@arcor.de>
Date: Tue, 10 Nov 2009 05:51:06 -0800 (PST)
Local: Tues 10 Nov 2009 13:51
Subject: Re: I love relational operators so much
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On 8 Nov., 02:08, Andrey Vul <andrey....@gmail.com> wrote:

> if (x)
>  y;
> else
>  z;
> becomes
> ((x)&&(y))
> ||(z);

It has to become something like
(x) && (y, 1)
    || (z);

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Morris Keesan  
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 More options 11 Nov, 04:04
Newsgroups: comp.lang.c
From: "Morris Keesan" <mkee...@post.harvard.edu>
Date: Tue, 10 Nov 2009 23:04:10 -0500
Local: Wed 11 Nov 2009 04:04
Subject: Re: I love relational operators so much
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On Tue, 10 Nov 2009 08:51:06 -0500, dS...@arcor.de <dS...@arcor.de> wrote:
> On 8 Nov., 02:08, Andrey Vul <andrey....@gmail.com> wrote:
>> if (x)
>>  y;
>> else
>>  z;
>> becomes
>> ((x)&&(y))
>> ||(z);

> It has to become something like
> (x) && (y, 1)
>     || (z);

And both forms are illegal if z has void type.  See 6.5.13 p2.

--
Morris Keesan -- mkee...@post.harvard.edu


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dragan  
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 More options 22 Nov, 06:13
Newsgroups: comp.lang.c
From: "dragan" <spambus...@prodigy.net>
Date: Sun, 22 Nov 2009 00:13:31 -0600
Local: Sun 22 Nov 2009 06:13
Subject: Re: I love relational operators so much
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Andrey Vul wrote:
> C's handling of 'if' leads to a lot of room for obfuscation. All you
> have to do is replace ';' with '|' for compound expressions and add
> parentheses as neccessary.

I see no love in that. "plonk" for false advertising.

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Phil Carmody  
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 More options 22 Nov, 12:59
Newsgroups: comp.lang.c
From: Phil Carmody <thefatphil_demun...@yahoo.co.uk>
Date: Sun, 22 Nov 2009 14:59:24 +0200
Local: Sun 22 Nov 2009 12:59
Subject: Re: I love relational operators so much
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Andrey Vul <andrey....@gmail.com> writes:
> C's handling of 'if' leads to a lot of room for obfuscation. All you
> have to do is replace ';' with '|' for compound expressions and add
> parentheses as neccessary.
> for compounds,
> if (x)
>  y;z;a;b;
> else
>  c;d;e;f;
> becomes
> ((x) && ((y)|(z)|(a)|(b))
> ||((c)|(d)|(e)|(f));

Codswallop. You clearly have avoided learning anything about
order of evaluation. Which, given that it's one of the most
commonly discussed things on c.l.c, is either terribly sloppy,
or deliberate. Neither being commendable.

> C is so much fun to obfuscate. Gotta love ISO 9899.
> The result is still more readable than perl, though.

Almost any language can be made practically un readable.
Some just make it trivial, or even natural.

Phil
--
Any true emperor never needs to wear clothes. -- Devany on r.a.s.f1


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