/**
* Функция преобразования дробей при умножении
*/
public function convert_div_in_mult()
{
$divop = array();
// временный массив
// взять дроби
for ($i = 0; $i < count($this->childrens); $i++) {
if (get_class($this->childrens[$i]) == 'qtype_correctwriting_div_operator') {
array_push($divop, $this->childrens[$i]);
array_splice($this->childrens, $i, 1);
$i--;
}
}
// создать новый
if (count($divop) > 1) {
$tmp = new qtype_correctwriting_multi_operator();
foreach ($divop as $i => $value) {
array_push($tmp->childrens, $value->right);
}
$newch = new qtype_correctwriting_div_operator();
$newch->left = new qtype_correctwriting_operand("1", 1);
$newch->right = $tmp;
$newch->calculate_tree_in_string();
$divop = array($newch);
}
// возвращать в списку сыновей
foreach ($divop as $value) {
array_push($this->childrens, $value);
}
}
public function convert($parent)
{
$this->convert_each_childrens();
$tmp = new qtype_correctwriting_div_operator();
$tmp->left = clone $this->left;
$tmp->right = $this->right;
$tmp->calculate_tree_in_string();
$newass = new qtype_correctwriting_assign_operator();
$newass->left = $this->left;
$newass->right = $tmp;
$newass->calculate_tree_in_string();
$this->ptonewchild = $newass;
}