How to call a class pointer function

Question

So basically I have 2 classes, BSTNode class and BST class, BSTNode is friend of BST.

In my BST class , I have these public functions

---

void BST::Insert(int val);
{
..do stuff
}

---

void BST::PostorderDFT(BSTNode* node)
{
 ...do stuff
}

---

I know that I have to create an object. Lets say :

---

int main(void)
{
 BST bst1;

//then use the object I just created to create a tree. Lets say:
{
bst1.Insert(1);
bst1.Insert(2);
bst1.Insert(4);
bst1.Insert(10);
ect..

So my question is, how can I call the PostorderDFT(BSTNode* node) function in main function. Or what argument should I pass to make it work because the parameter (BSTNode* node) is a class pointer, so it is quite hard to understand.

Thank you.

Answer 1

You can define a variables of BSTNode like this:

BSTNode node;

You can use a constructor as follow:

BSTNode node(0,NULL,NULL);

Then, You can assignment for this variables as usual,Finally,You can use this variables like this:

// some assignment 
// ...
bst1.PostorderDFT(&node);