Compile Error/Class Definition

[JC0724]

I am receiving a compile error "'IntNode:trSlot' uses undefined class 'LinkedList1'"
for the code that is in bold below LinkedList1 ptrSlot; . When I remove that it works fine. I tried declaring the classes above but this does not fix the issue?

I am not sure what is wrong?

//My example

#include <iostream>
using namespace std;

class IntNode;
class LinkedList1;


class IntNode {
	public:
		IntNode(){}
		IntNode(int theData, IntNode* theLink) : data(theData),link(theLink) {}
		IntNode* getLink() const {return link; }
		int getData() const {return data; }
		void setData(int theData) {data = theData; }
		void setLink(IntNode* pointer) {link = pointer; }
		//void headInsert(int theData1) { ptrSlot.headInsert(theData1); }
		//void remove(int theData1) { ptrSlot.remove(theData1); }
		//void deleteHeadNode() { ptrSlot.deleteHeadNode(); }

private:
	int data;
	IntNode *link;
	[B]LinkedList1 ptrSlot;[/B]

};typedef IntNode* IntNodePtr;

class LinkedList1 {
	public:
		LinkedList1() {head = NULL;}
		void headInsert(int theData);
		void insert(IntNodePtr afterMe, int theData);
		void deleteHeadNode();
		void remove(int theData);
		void output();
	private:
		IntNodePtr head;
};

int main() {
	char ans;
	int tableSize=0;

	cout<<"Please enter in the table size: ";
	cin >> tableSize;
	LinkedList1* first;

	first = new LinkedList1[tableSize];


	do {
		first[0].headInsert(2);
		first[0].headInsert(3);
		first[0].headInsert(4);
		first[0].headInsert(5);
		first[0].headInsert(6);
		first[0].output();
		first[0].deleteHeadNode();
		cout<<endl;
		first[0].output();
		first[0].remove(3);
		cout<<endl;
		first[0].output();

		cout << "Would you like to start over again(y = yes/n = no)? ";
		cin >> ans;

	} while (ans != 'n');

	return 0;
}//end of main


void LinkedList1::headInsert(int theData) {
	head = new IntNode(theData, head);
}//end of headInsert

void LinkedList1::insert(IntNodePtr afterMe, int theData) {
	afterMe->setLink(new IntNode(theData, afterMe->getLink()));
}//end of insert

void LinkedList1::deleteHeadNode() {
	if (head != NULL) {
		head = head->getLink();
	}//end of if statement
	else {
		cout<<"You are at the first node already"<<endl;
	}//end of else
}//end of deleteHeadNode

void LinkedList1::remove(int theData) {
	IntNodePtr before,discard,test; 
	before = head;
	discard = head;
	test = head;
	int count1 = 0;
	int count2 = 0;
	int count3 = 0;

	if (before == NULL) {
		cout<<"List is empty"<<endl;
	}
	else {
		while(discard->getData() != theData && discard->getLink() != NULL) {
			count1++;
			discard = discard->getLink();
		}//end of while loop

		int i = count1 - 1;

		while (count2 != i) {
			before = before->getLink();
			count2++;
		}//end of while loop

		while(test->getLink() != NULL) {
			test = test->getLink();
			count3++;
		}

		if(count3 == count1) {
			cout<<"Value is not in the list"<<endl;
		}
	}

	before->setLink(discard->getLink());
}//end of remove function

void LinkedList1::output() {
	IntNodePtr position = head;

	if(position == NULL) {
		cout<<"The list is empty"<<endl;
	}
	else {
		while(position != NULL) {
			cout<<"The values of the list are "<<position->getData()<<endl;
			position = position->getLink();
		}//end of while loop
	}
}//end of output list

 

[Blazestorm]

You forward declare LinkedList1, but you use it as a member object (not pointer/reference), so the compiler needs to see the full definition before hand (needs to know the size of the type among other things).

Instead remove it altogether if you don't need it. It doesn't really make sense for the two classes to be dependencies of each other. From the looks of it you already commented out the code, but forgot to get rid of the variable.