class Node { int m_nVal; Node* m_pLeftNode; Node* m_pRightNode; }; 1.create 2.由小到大遍巡並列出值 3.由大到小遍巡並列出值 4. 由最根處從上而下、從左至右列出值 5.search 6. 總節點數 Class Node: m_pLeftNode存放比nVal還小的的Node,m_pRightNode存放比nVal還大的Node