//checks if two lists are equal in state (contain the same values in the same order)
bool LinkedList::operator ==(const LinkedList& other) const
{
	//Test if the two lists are equal
	return (other.head && this->head) && (other.tail && this->tail);
}

//checks if two lists are not equal in state
bool LinkedList::operator !=(const LinkedList& other) const
{
	//flag is initialised to 1
	int flag = 1;
	//temp2 is set to head node and temp2 is set to the other head node
	Node *temp1 = head;
	Node *temp2 = other.head;
	while (temp1 != nullptr && temp2 != nullptr) {
		if (temp1->data != temp2->data) flag = 0;
		//temp1 and temp2 is both set to the next node
		temp1 = temp1->next; temp2 = temp2->next;
	}
	if (temp1 == nullptr || temp2 == nullptr && !(temp1 == nullptr&&temp2 == nullptr))
		//flag is set to 0
		flag = 0;

	if (flag == 1)
	{
		return false;
	}

	return true;
}