evdrug/project-lvl1-s276

<?php

namespace BrainGames\Games\Gcd;

use BrainGames\Core;

const RANDOM_NUM_MIN = 0;
const RANDOM_NUM_MAX= 100;
const DESCRIPTION = 'Find the greatest common divisor of given numbers.';

function run()
{
    $quizGcd = function () {
        $number1 = rand(RANDOM_NUM_MIN, RANDOM_NUM_MAX);
        $number2 = rand(RANDOM_NUM_MIN, RANDOM_NUM_MAX);

        $question = "{$number1} {$number2}";
        $answer = gcd($number1, $number2);

        return ['question' => $question, 'answer' => (string)$answer];
    };

    Core\runGame(DESCRIPTION, $quizGcd);
}

function gcd($number1, $number2)
{
    while ($number1 != 0 && $number2 != 0) {
        if ($number1 > $number1) {
            $number1 = $number1 % $number2;
        } else {
            $number2 = $number2 % $number1;
        }
    }
    return $number1 + $number2;
}