Link Error, Why doesn't my simple binary search tree class work??

[hn.ft.pris]

I have the following code:

Tree.h defines a simple binary search tree node structure
########## FILE Tree.h ############### #
#ifndef TREE_H
#define TREE_H
//using namespace std;
template <typename Tclass Tree{
private:
Tree<T*left;
Tree<T*right;
T data;
public:
Tree(const T& item, Tree<T>* lptr, Tree<T>*
rptr):data(item ),left(lptr),ri ght(rptr){};
Tree<T>* Left() const;
Tree<T>* Right() const;
};

#endif
############### ############### #########
Tree.cpp implemented Tree<T>* Left() const and Tree<T>* Right() const
############### FILE Tree.cpp ###########
#include "Tree.h"
#include <iostream>
using namespace std;

template <typename TTree<T>* Tree<T>::Left() const{
return left;
}

template <typename TTree<T>* Tree<T>::Right( ) const{
return right;
}
############### ############### ##########

Tree_Scan.h defines a "inorder" scan function on the binary search tree
############### ### FILE Tree_Scan.h#### #####
#ifndef TREE_SCAN_H
#define TREE_SCAN_H

#include "Tree.h"
//using namespace std;

template <typename Tvoid inorder(Tree<T> *);

#endif
############### ############### #############

Tree_Scan.cpp implemented "inorder" function
############### ##FILE Tree_Scan.cpp## #######
#include "Tree.h"
#include "Tree_Scan. h"
#include <iostream>
using namespace std;

template <typename Tvoid inorder(Tree<T> * tree){
if(tree != NULL){

inorder(tree->left());

cout << (*tree).data << endl;

inorder(tree ->right());
}
}
############### ############### #############

In the main function, first a binary search tree is built and then
perform an "inorder" scan
on it
############### ###FILE main.cpp####### ######
#include "Tree.h"
#include "Tree_Scan. h"
#include <string>
using namespace std;

int main(){
Tree<string*g = new Tree<string>("G ", NULL, NULL);
Tree<string*h = new Tree<string>("H ", NULL, NULL);
Tree<string*i = new Tree<string>("I ", NULL, NULL);
Tree<string*f = new Tree<string>("F ", NULL, NULL);

Tree<string*d = new Tree<string>("D ", NULL, g);
Tree<string*b = new Tree<string>("B ", d, NULL);
Tree<string*e = new Tree<string>("E ", h, i);
Tree<string*c = new Tree<string>("C ", e, f);
Tree<string*a = new Tree<string>("A ", b, c);

inorder(a);

return 1;
}
############### ############### ############### #####

When linking a got a link error, complain that there is something wrong
with "inorder(a) ", I've
checked my program several times and find no problem, why it fails?
Thanks for helping me!

[red floyd]

hn********@gmai l.com wrote:

[full code -- thank you, by the way -- redacted]

Linker error on templated function.

This is a FAQ.

See http://www.parashift.com/c++-faq-lit...html#faq-35.13