definition module BinTree

::  Tree a = Node a (Tree a) (Tree a) | Leaf

t0 :: Tree Int
t1 :: Tree Int
t2 :: Tree Int
t3 :: Tree Int
t4 :: Tree Int
t5 :: Tree Int
t6 :: Tree Int
t7 :: Tree Int

//nodes  :: // meest algemene type
//leaves :: // meest algemene type
//diepte :: // meest algemene type