Re: YACT (Yet Another C Trap)

[stefan-lucks@see-the.signature]

On Sun, 29 Aug 2010, Maciej Sobczak wrote:

> > int x = 10,000; // oops, it will compile, perhaps even without
> > warnings. Happy debugging!
> 
> Did you actually tried or are just repeating unchecked nonsense?
> The above example is explicitly handled (forbidden) by both C and C++
> standards - comma has special meaning in declarators.

I tried it out. The above example gives an error. But the following 
program compiles without warnings with gcc:

#include <stdio.h>
int main (int argc, char **argv)
{ float x;

    x = 12,3;

    if (x > 12.1) printf("greater"); else printf("smaller or equal");
  printf(" than 12.1.\n");
}

Here is what it does:

> gcc flaw.c    
> ./a.out
smaller or equal than 12.1.

Is this a language flaw of C, or a bug in gcc?


-- 
------ Stefan Lucks   --  Bauhaus-University Weimar  --   Germany  ------
               Stefan dot Lucks at uni minus weimar dot de
------  I  love  the  taste  of  Cryptanalysis  in  the  morning!  ------