Can I do boolean tests in a struct?

[unarmed1618]

Basically, here's what I want.
I want to make a binary tree node struct that has a dynamic pointer inside of it that points to the next free node.
I figured that this: could work.

struct TreeNode {
TreeItem goodies;
TreeNode * left;
TreeNode * right;
TreeNode * next;

if (*left ==NULL)
*next = *left;
else if (*right ==NULL)
*next = *right;
else 
*next = NULL;


//Constructor stuff omitted
}

Can it ?

[tgiec]

yes, you can do boolean tests.But that should be in some function.

Also

if (*left ==NULL)
*next = *left;
else if (*right ==NULL)
*next = *right;
else 
*next = NULL;

needs to be modified as we compare the NULL pointer with pointer only, not content ,so '*' should be removed as shown below.

if (left ==NULL)
next = left;
else if (right ==NULL)
next = right;
else 
next = NULL;