Linked List Queue template argument list error [duplicate] - c++

Question

Trying to make a B inary S earch T ree (BST for short) using a template.
When I try to create a new instance of my BST I get an unexpected error. I hope the solution does not involve pointers since I would like to keep them at a minimum.
For now I have:
template <typename Type>
class BST { // The binary search tree containing nodes
private:
BSTNode<Type> *root; // Has reference to root node
public:
BST ();
bool add (int, Type);
};
And the Node type:
EDIT: When I cut out code to un-encumber text, I forgot the constructor, now it's been added
template <typename Type>
class BSTNode { // Binary Search Tree nodes
private:
int key; // we search by key, no matter what type of data we have
Type data;
BSTNode *left;
BSTNode *right;
public:
BSTNode (int, Type&);
bool add (int, Type);
};
EDIT2: Here is the actual constructor
template <typename Type>
BSTNode<Type>::BSTNode (int initKey, Type &initData) {
this->key = initKey;
this->data = initData;
this->left = NULL;
this->right = NULL;
}
I want to try and test if anything works / doesn't work
BSTNode<int> data = new BSTNode (key, 10);
And I get: Expected type specifier before BSTNode. I have no idea what I'm doing wrong, but one thing I do hope is I don't have to use data as a pointer.
BSTNode<int> data = new BSTNode<int> (key, 10);
Also does not work, seems it believes < int > is < & int> and it doesn't match

Answer 1

First, you need to fully specify the type on the RHS of the assignment, and, since you are instantiating a dynamically allocated node with new, the LHS should be a pointer:
BSTNode<int>* data = new BSTNode<int> (key, 10);
^ ^
If you don't need a node pointer, then use
BSTNode<int> data(key, 10);
Second, your BSTNode<T> class doesn't have a constructor taking an int and a Type, so you need to provide that too.
template <typename Type>
class BSTNode {
public:
BSTNode(int k, const Type& val) : key(k), data(val), left(0), right(0) { .... }
};