Linked List not appending?

[ZombieKing]

My professor is having us work with linked lists and create a "shopping list" with two different types of items (price by the pound, and each item). I'm able to get my file to read into a class. It appears to be appending to the next node, but for the life of me I can't get the showInfo to work. Here is my main(I can't find where it would be screwy), everything else is verbatim from my professor, include my linkedList, node, products, byTheItem:products, byThePound:products classes.

int main(){

	string name;

	cout << "Please enter file location: ";
	cin >> name;

	ifstream fname(name);

	if (!(fname.is_open())){
		cout << "File not found";
		return -1;
	}

	int pluCode;
	char str[100];
	int type;
	double price;
	double inventory;

	linkedList * list = new linkedList();

	while (!fname.eof()){
		fname >> pluCode >> str >> type >> price >> inventory;
		//cout << pluCode << str << type << price << inventory << endl;

		if (type == -1 || type == 2){
			cout << "File corrupt at ITEM_TYPE." << endl
				<< "Please check file." << endl;
			return -1;
		}
		else if (type == 0) {
			byTheItem * items = new byTheItem();
			items->setPLU(pluCode);
			items->setProduct(str);
			items->setItem(type);
			items->setPrice(price);
			items->setInven(inventory);
			cout << endl << "Type is " << items->getItem() << "!" << endl;

			node * n = new node();
			n->setItem(items);
			
			list->appendNode(n);
			
		}
		else if (type == 1){
			byThePound * pounds = new byThePound();

			pounds->setPLU(pluCode);
			pounds->setProduct(str);
			pounds->setType(type);
			pounds->setPrice(price);
			pounds->setInven(inventory);
			cout << endl << "Type is "<< pounds->getType() << "!" << endl;

			node * n = new node();
			n->setPound(pounds);

			list->appendNode(n);
			
		}
		list->showInfoP();
		
		
	}

	return 0;
}

and my appendNode

void appendNode(node * n){
		if (head == nullptr){
			head = n;
		}
		else {
			node * iter = head;
			while (iter->getNext()){
				iter = iter->getNext();
			}
			iter->setNext(n);
		}
		size++;
	}

[Jaybob66]

can you show us the showInfoP() function so we can see what it is expecting to do?