>type tryit.pl
use strict;
use warnings;
my $add_in = ();
my @$add_in = $add_ins[0];


>perl tryit.pl
"my" variable $add_in masks earlier declaration in same scope at tryit.pl line 4
.
Can't declare array dereference in "my" at tryit.pl line 4, near "$add_in ="
Global symbol "@add_ins" requires explicit package name (did you forget to decla
re "my @add_ins"?) at tryit.pl line 4.
Execution of tryit.pl aborted due to compilation errors.