public static function ex1()
{
self::$u = 1;
$lowest = $u;
$step = 0;
while (1 + $u !== 1.0) {
$u = (double) $u / 10;
$step++;
$lowest = $u;
}
header('Content-type: application/json');
// make json
echo json_encode(array('step' => $step, 'lowest' => $lowest, 'u' => $u));
exit;
}
if (isset($_POST['action'])) {
if (isset($_POST['homework'])) {
switch ($_POST['homework']) {
case 1:
switch ($_POST['action']) {
case 'ex1':
HomeWork1::ex1();
break;
case 'ex2':
HomeWork1::ex2();
break;
case 'ex3':
HomeWork1::ex3();
break;
case 'ex4':
HomeWork1::ex4();
break;
}
break;
case 2:
switch ($_POST['action']) {
case 'ex1':
HomeWork2::ex1();
break;
case 'ex2':
HomeWork2::ex2();
break;
case 'ex3':
HomeWork2::ex3();
break;
case 'ex4':
