I really wouldn't recommend using packages this way. However, if you're intent on doing it this way, this seems to work: 

use strict;
use warnings;

use Test::More 'no_plan';

package my_temp_convert;

my $curr_scale=0; #centigrade, 1=faren
my $cur_ctemp=0;
sub set_scale{ $curr_scale=shift}
sub set_temp{  $cur_ctemp =shift}
sub c {return $cur_ctemp;}
sub f {return 32+(9*$cur_ctemp)/5}

package main;

*set_scale = \&my_temp_convert::set_scale;
*set_temp  = \&my_temp_convert::set_temp;
*c         = \&my_temp_convert::c;
*f         = \&my_temp_convert::f;

set_scale(1);
set_temp(0);

is( f(), 32, 'f() returns 32' );
is( c(), 0, 'c() returns 0' );

[download]

You might also want to look at Re^3: Beyond Inside-Out (details), which has some interesting examples.

Generally, I'd advise using a real object for this kind of job. Then you'd do: 

my $temp = My::Temp::Thing->new();
$temp->set_c(0);
is( $temp->get_f(), 32, '0 c is 32 f' );

[download]

In that case, you don't clutter your current name space with junk from another package. You can have multiple temperature objects instead of just One. Etc.

In reply to Re: multiple "sub" packages in 1 file: possible? how? by kyle
in thread multiple "sub" packages in 1 file: possible? how? by perl-diddler

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