I don't think you're doing what I told you to. I said to include this file:
Code:
#include<iostream>
#include"tree.h"

using namespace std;

template<class elemType>
bool binaryTreeType<elemType>::isEmpty()
{
    return(root==NULL);
} 

...etc
at the end of *this* file:
Code:
template<class elemType>
struct nodeType
{
    int key_value;
    nodeType<elemType> *left;
    nodeType<elemType> *right;
    elemType info;
    nodeType<elemType> *llink;
    nodeType<elemType> *rlink;
   
};

template<class elemType>
class binaryTreeType 

...etc