#!/usr/bin/perl
use strict;
use warnings;

require Unit6;
require CMQIA;
# require Quadrilaterals; etc

Unit6::run();


##</code><code>##

package Unit6;
use strict;
use warnings;

sub run {
	print "
		This is Unit 6 - Quadrilaterals and Polygons.\n
		For the Final Exam, you will have to know the\n
		properties of all quadrilaterals and how to\n
		prove that a given shape is any quadrilateral.\n
		To access the Quadrilateral Information Database,\n
		type 'Quads.' To access the Casio-Maxim Quadrilateral\n
		Identification Algorithm, type 'crazy Maxim.'\n
		Type 'quit' to exit Unit 6.\n
		Type your choice.\n\n";
	my $Choice = <STDIN>;
	chomp $Choice;
	if ($Choice =~ /quit/i)
		{ print "\nBye.\n\n"; exit;}
	elsif ($Choice =~ /quads/i)
		{ Quadrilaterals::run();}
	elsif ($Choice =~ /crazy maxim/i)
		{ CMQIA::run();}
}
1;

##</code><code>##

package CMQIA;
use strict;
use warnings;

sub run {
	print "
		Welcome to the Casio-Maxim Quadrilateral Identification\n
		Algorithm. In order to identify said quadrilateral,\n
		you must have the coordinates of all 4 vertices.\n";
	print "
		When you are ready to input your coordines, type\n
		'ready.' Type anything else to exit the CMQIA.\n\n";

	my $Choice = <STDIN>;
	chomp $Choice;
	if ($Choice =~ /ready/i)
		{ maxim();}
	else
		{ Unit6::run();}
}

sub maxim {
	print "\nFor shape ABCD, in which point A has coordinates (X1, Y1), B has coordinates\n\n(X2, Y2), C has coordinates (X3, Y3), and D has coordinates (X4, Y4),\n\nX1 = ";

	my $AX = <STDIN>;
	chomp $AX;
	print "Y1 = \n";
	my $AY = <STDIN>;
	chomp $AY;
	print "X2 = \n";
	# etc
}
1;