valens_2

#pragma once
struct list {
	char el;
	list *next;
};
class List
{
public:
	List()
	{
		head = NULL;
	}
	list* add(char ch);
	list* del();
	list* gethead();
	List operator |(const List &right);
	List operator |=(const List &right);
	List operator &(const List &right);
	List operator &=(const List &right);

private:
	list * head;

};

list * List::gethead()
{
	return head;
}

list * List :: add( char ch)
{
	list *ptr = (struct list*)malloc(1 * sizeof(struct list));
	ptr->el = ch;
	ptr->next = head;
	head = ptr;
	return (head);
}

list* List :: del()
{
	list* tmp = head->next;
	while (tmp != NULL)
	{
		tmp = head->next;
		free(head);
		head = tmp;
	}
	return head;
}

List List :: operator |(const List &right)
{
	List left(*this);
	return (left |= right);
}
List List :: operator |=(const List &right)
{
	list* mem = head,
		vright = right.gethead();
	bool flaq;
	while (right.head != NULL)
	{
		flaq = true;
		while (head != NULL && flaq)
		{
			if (head->el == vright->el)
				flaq = false;
			head = head->next;
		}
		head = mem;
		if (flaq)
			add(vright->el);
		vright = vright->next;
	}
}
List List :: operator &(const List &right)
{
	List left(*this);
	return (left &= right);
}
List List ::operator &=(const List &right)
{

}