[Bug c++/54180] a bug using strcat function - it depends on variable declare order, but it should not.

["redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54180

--- Comment #11 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-08-10 15:04:10 UTC ---
Also, you declare SQL_date_begin[10] then fill it with 11 characters
(YYYY-MM-DD plus the numm terminator) and do the same with SQL_date_end

This is horrible, horrible code and should be deleted immediately.

(In reply to comment #5)
> it should work without problems, because of programming language syntax which
> is a standart.
> But it works so, that SQL1 partially overwrites value of SQL_date_begin and
> values are
> not such as expected.

Please check the standard before arguing about it. The C standard states that
for the functions in <string.h> "If an array is accessed beyond the end of an
object, the behavior is undefined."  

To understand undefined behaviour see:
http://en.wikipedia.org/wiki/Undefined_behavior


> I never heard, that the "C" language is outdated. The "C++" is just another
> standart which includes
> the syntax of "C".

Noone said it's outdated, what on earth are you talking about?

> So I consider it is as an GCC error which should be fixed, also because all
> standart libraries
> come along with GCC.

No, the strcat and strcpy functions come from the C library provided by your
OS, they do not come from GCC. If you still believe there is a bug then maybe
you should report it to Microsoft instead.