use warnings;
   use strict;

##</code><code>##

   use diagnostics;

##</code><code>##

    Use of implicit split to @_ is deprecated 
    at ./t line 7 (#1)
    (D deprecated) It makes a lot of work for the 
    compiler when you clobber a subroutine's argument 
    list, so it's better if you assign the results
    of a split() explicitly to an array (or list).