Thread: Calculator + LinkedList

i'v tryed to creat new node if fFirst is empty but got a problem to test if fFirst is empty

Code:

void LinkedList::push_back (CalcCommand* data)
{
	
	if (isEmpty())
	{
		fFirst->setNext(data);
	}
	else
	{
		CalcCommand* temp =fFirst;

		while (temp->getNext() != 0)
		{
		    temp = temp -> getNext ();//to let temp point to the last node in the list
		}
		
		temp -> setNext (data);//this will add data to the end of the list
		data -> setNext (0); //and this will set the one after the end of the list to NULL
	}
}