MaxSmakov/project-lvl1-s136

<?php

namespace BrainGames\Games\Calc;

use function \Braingames\Cli\intro;
use function \Braingames\Cli\game;

const PURPOSE = 'What is the result of the expression?';

function run()
{
    $problem = function () {
        return problemF();
    };
    $getTrueAnswer = function ($purpose) {
        return trueF($purpose);
    };
    game($problem, $getTrueAnswer, PURPOSE);
}

function problemF()
{
    $num1 = rand(1, 100);
    $num2 = rand(1, 100);
    $arrSigns = ['+', '-', '*'];
    $sign = $arrSigns[array_rand($arrSigns)];
    return "{$num1} {$sign} {$num2}";
}

function trueF($purpose)
{
    list($num1, $sign, $num2) = explode(' ', $purpose);
    switch ($sign) {
        case '+':
            return $num1 + $num2;
            break;
        case '-':
            return $num1 - $num2;
            break;
        case '*':
            return $num1 * $num2;
            break;
    }
}