ch04.041_best

来自「Perl Best Practices the source code」· 041_BEST 代码 · 共 26 行

##############################################################################
##   Code fragment (Recommended) from Chapter 4 of "Perl Best Practices"    ##
##     Copyright (c) O'Reilly & Associates, 2005. All Rights Reserved.      ##
##  See: http://www.oreilly.com/pub/a/oreilly/ask_tim/2001/codepolicy.html  ##
##############################################################################


# Standard modules...
use strict;
use warnings;
use IO::Prompt;
use Carp;
use English qw( -no_match_vars );
use Data::Alias;
use Readonly;


use bignum;
my $PI = 3.141592_653589_793238_462643_383279_502884_197169_399375;
 
my $subnet_mask= 0xFF_FF_FF_80;

use Data::Dumper 'Dumper';
warn "PI = $PI\n";
warn "subnet_mask = $subnet_mask\n";