Thread: Newb question about tree in c++...

Hi, I have a problem understanding how to increment the occupancy in my constructor is it looks like dis:

Code:

template <class Whatever>
struct TNode {
	long balance;
	Whatever data;
	long height;
	TNode<Whatever> * left;
	long & occupancy;
	TNode<Whatever> * right;
	unsigned long & tree_count;
	
	TNode (const Whatever & element, Tree<Whatever> & theTree)
		: balance (0), data (element), height (0), left (0), 
		occupancy (theTree.occupancy), right (0), 
		tree_count (theTree.tree_count) {
             // INCREMENT OCCUPANCY
	}

cuz i tried occupancy++; <- doesnt work...
I have tried everythingt o understand... but I still do not understand how to increment the occupancy in the constructor... plz help...

What about occupancy++ doesn't work? It should work, as long as you put it inside your constructor, and not randomly in the initialization list. You could also add the ++ to the initialization part if you tack it on to theTree.occupancy.

the error when I run the gdb (debug) says that:

warning: Source file is more recent than executable.

46 occupancy++;

...

I believe that means that you need to rebuild the executable. When you change the code you need to build the executable again before running it.

sorry, I am confused in what that means... does that mean I need to change something in my main? or in my tree constructor?

No, it means you have to compile and link your code. The code is correct, your debugger is telling you that you have to re-compile the changes.