Our Lowest Common Multiple code in Perl.
List Lowest Common Multiple Class File:
package LCM;
BEGIN {
require Exporter;
# for the sake of standard
our $VERSION = 2016.12;
# Inherit from exporter to export functions and variables
our @ISA = qw(Exporter);
# Functions and variables to be exported by default
our @EXPORT_OK = qw(getLCM);
}
use warnings;
use strict;
my ($index, $state_check, $calc_result);
my (@set_of_numbers, @arg_copy, @all_factors);
# simulate an object construct
# takes one arguments -- besides its name;
# array reference of values whose LCM is sought
sub new {
no warnings "all";
my $this = shift;
my $parameters = {@_};
bless $parameters, $this;
$this->_init(@_);
return $this;
}
# Simulate a constructor
sub _init {
my $self = shift;
my $tmp = shift;
@set_of_numbers = @{$tmp};
@all_factors = ();
# Sort array in descending order
@set_of_numbers = sort {$b <=> $a} @set_of_numbers;
$index = 2;
$state_check = 0;
$calc_result = 1;
}
sub findLCMFactors {
# Copy 'set_of_numbers' into 'arg_copy'
@arg_copy = @set_of_numbers;
# STEP 1:
# sort in descending order
@arg_copy = sort {$b <=> $a} @arg_copy;
while ($index <= $arg_copy[0]) {
$state_check = 0;
for (0 .. $#set_of_numbers) {
if (($set_of_numbers[$_] % $index) == 0) {
# STEP 3:
$set_of_numbers[$_] /= $index;
push @all_factors, $index if !$state_check;
$state_check = 1;
}
}
# STEP 4:
return findLCMFactors() if $state_check;
$index++;
}
return;
}
# Returns an array reference of the desired set of even numbers
sub getLCM {
# STEP 2:
$index = 2;
findLCMFactors();
# iterate through and retrieve members
for (@all_factors) {
$calc_result *= $_;
}
return $calc_result;
}
1;Main Class:
#!/usr/bin/perl;
use strict;
use warnings;
use LCM;
# Useful variables
my $answer;
my @set;
# Use the LCM module/class
@set = (2, 3, 4);
my $lcm = LCM->new(\@set);
$answer = $lcm->getLCM();
print ("The L.C.M. of ", join(", ", @set), " is $answer\n");Try it out!
Elegance (0.0)
