Hi,

That is what the code I gave is really doing.

sub work_n_save {
    ...  ## whatever
    my $filename = $File::Find::name if !-d;   ## get file name if not
+ directory
    $filename = basename($filename);           ## get the file base na
+me
 ## The line below assumes, files have extention
    $filename =~ s/\..+$//;                    ## remove the file exte
+ntion
    open my $fh_new, '>', $filename . "_Result" or croak "can't open f
+ile: $!";
    open my $fh, '<', $_ or croak "can't open file: $!";
    while ( defined( my $line = <$fh> ) ) {
        chomp $line;
          ## do whatever you want
        print {$fh_new} $line, $/;
    }
}
[download]

NOTE:

Please, don't forget that the subroutine "work_n_save" is called as sub. reference in the find subroutine of the module File::Find, which transverse the whole of the directory ( or directories).
Also, note the way the new files are opened:

open my $fh_new, '>', $filename . "_Result" or croak "can't open file:
+ $!";
[download]

Hope this helps.