On Mon, Mar 19, 2007 at 02:07:25PM +0100, Otto Moerbeek wrote: > On Mon, 19 Mar 2007, Nick ! wrote: > > > On 3/19/07, hiren <[EMAIL PROTECTED]> wrote: > > > hi all, > > > > > > i found it interesting that cat.c compiles after removing these > > > includes: > > > > > > #include <ctype.h> > > > #include <err.h> > > > #include <errno.h> > > > #include <string.h> > > > #include <unistd.h> > > > > > > im just curious to hear opinions and learn something ;) > > > > That's probably because all these files are implicitly included by > > some other include files. However, it is more correct to keep them all > > here explicitly because cat.c uses them directly; you should want > > someone reading the code to have a list of 'libraries' it relies on. > > > > Good question. > > Compile with -Wall and draw your conclusions. > > While it's legal to call a undeclared function, it is not wise to do > so.
Let me guess, that guy is running on i386. Usually, this kind of stunt works badly on fun arches like alpha or sparc64...
