c++ - AVL Tree implementation with nodes or without nodes -


we have class project implement avl tree. here 2 general implementations:

template<class t> class avltree {   int key;   int height;   int bf;   t data;   avltree<t>* father, leftson, rightson; . . . }

a friend told me should use nodes wasn't able explain why. here second implementation have seen in many places (using node):

template<class t> class avltree {   int key;   int height;   int bf;   t data;   node* father, leftson, rightson;    class node {     int key;     int height;     int bf;     t data;     node* father, leftson, rightson;   } . . . }

what's difference? implementation impossible in terms of compiler?

technically, right , nodes not necessary, though remember c++ oop language, , object want avltree, consisted of nodes.


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