LinkedList.obj : error LNK2019: unresolved external symbol "class std::basic_ostream<char,struct std::char_traits<char> > & __cdecl operator<<(class std::basic_ostream<char,struct std::char_traits<char> > &,struct LinkedList<int>::Element const &)"  referenced in function _main
1>LinkedList.exe : fatal error LNK1120: 1 unresolved externals

template <class Type> class LinkedList {
public:
	struct Element{
		friend ostream& operator<< ( ostream &output, const typename Element &E);
	};
};

template <typename Type>
ostream& operator <<(ostream& output, const typename LinkedList<Type>::Element& E){

linkedlist.cpp(38): error C2785: 'std::ostream &operator <<(std::ostream &,const LinkedList<Type>::Element &)' and '<Unknown>' have different return types

template < class Type > class Element {
public:
    Type Data;
    friend ostream& operator << <>( ostream &output, const typename Element<Type> &E);
}

template < class Type > class LinkedList {
public:
    Element<Type>&    operator[](int index);	 //For Left Hand Values
    const Element<Type>& operator[](int index) const; //For Right Hand Values
}

ostream& operator<<( ostream &output, const typename Element<Type>& E){
    return output << E.Data;
}

template <class Type> const typename Element<Type>& LinkedList<Type>::operator[](int index) const{
    Element<Type> Answer;
    //Logic Here
    return *Answer
}

int main(){
    LinkedList<int> Array1;
    //init and add memebers
    cout << Array1[0];
    return 0;