Transform the binary search tree into a sorted two-way linked list
Question:
Transform the binary search tree into a sorted two-way linked list.
do not use recursion.
do not create any new node, only adjust the pointer to point.
10
/ \
6 14
/ \ / \
4 8 12 16
-->>
4=6=8=10=12=14=16
struct BSTreeNode
{
int m_nValue; // value of