LInked List and Stack

[bookerb6]

Hey guys, I have alot of problems implementing the Stack as a Linked List.

I cannot seem to overload the ostream operator correctly.It says that the Node was not declared and I made the ostream Operator private.Please help

This is My Stack.h

#ifndef STACK_H
#define STACK_H

//#include "Queue.h"
#include "MyException.h"

#include <iostream>

using namespace std;

template<class T>
class Stack;

template<class T>
ostream& operator<<(ostream&,Stack<T>&);

template<class T>
class Stack
{
	public:
		
		friend ostream& operator<< <T>(ostream&,Stack<T>&);
		
		Stack();
		

		Stack(const Stack<T>& other);
		
		Stack<T>& operator=(const Stack<T>& other);
	
		~Stack();
		
		void push(const T& el);
		
		T pop();
		
		T peek();
		
		bool isEmpty();

	private:
	
		class Node
		{
			public:
				Node(const T& data, Node* n = 0)
				{
					element = data;
					next = n;
				}
				
				T element;
				Node* next;
		};
		
		
		Node* top;
	
};

#include "Stack.cpp"
			 
#endif 

This is my ostream

template<class T>
ostream& operator<< (ostream& os,Stack<T>& el){
	
	Node *temp = top;
	
	cout << "[";
	while(temp != NULL){
		
		os << temp->el << ",";
		temp = temp->next ;
	}
	
	cout << "]";
	
	//delete temp;
	
	return os;
	
}

Thanks.