definition module BinTree :: BTree a = BNode a (BTree a) (BTree a) | BLeaf t0 :: BTree Int t1 :: BTree Int t2 :: BTree Int t3 :: BTree Int t4 :: BTree Int t5 :: BTree Int t6 :: BTree Int t7 :: BTree Int //nodes :: // meest algemene type //leaves :: // meest algemene type //diepte :: // meest algemene type