Bubble Sort Issue

[jduhamel]

I am trying to implement a bubble sort algorithm in a linked list. The code runs to completion, but when I try to print it, I get the following error: Unhandled exception at 0x01222833 in LinkedList.exe: 0xC0000005: Access violation reading location 0xfeeefef6. I have included the relevant code below.

void dlist::BsortUp()
{
	node *j = new node();
	node *d = new node();
	bool unsorted = true;

	while (unsorted)
	{
		j = this -> front;
		d = this -> front -> next;
		unsorted = false;

		while (d != NULL)
		{
			if (j -> data > d -> data)
			{
				exchange(j,d);
				unsorted = true;
			}
			j = j -> next;
			d = d -> next;
		}
	}

	delete j;
	delete d;
}

void dlist::exchange(node *node1, node *node2)
{
	node *node3 = new node();
	node3 -> data = node1 -> data;
	
	node1 -> data = node2 -> data;
	node2 -> data = node3 -> data;

	delete node3;
}

void dlist::printForwards()
{
	node *j = this -> front;			//cursor points at the first node node::Vtype he list
	
	while (j != NULL){
		cout << j -> data << endl;		//print cursor's data
		j = j -> next;					//shift the cursor to the next node in the list
	}

	delete j;
	cout << endl;
}

The code is trying to sort this:

35
10
15
50
25
20

and outputs:

10
15
20
25
35
-2.65698e+303

and then gives me an error.

If anyone sees my problem, I would be so grateful. Thanks