<?php

	$v = new Vector();
        $v->x = 1.0;
        $v->y = 2.0;
        $v->z = 3.0;

	$w = new Vector();
        $w->x = 10.0;
        $w->y = 11.0;
        $w->z = 12.0;

	echo "I just created the following vector\n";
	vector_print($v);
	vector_print($w);

	echo "\nNow I'm going to compute the dot product\n";

	$d = dot_product($v, $w);

	echo "dot product = $d (should be 68)\n";

	echo "\nNow I'm going to add the vectors together\n";

        $r = new Vector();
	vector_add($v, $w, $r);

	vector_print($r);

	echo "The value should be (11,13,15)\n";

	echo "\nNow I'm going to clean up the return result\n";

	unset($r);

	echo "Good\n";
