Introduction - If you have any usage issues, please Google them yourself
Binary tree algorithm /* binary search, pre-order: the left and right in order: left, right after the sequence: left in the A (4)+-------+-------+ B (2 ) C (9)+-+-++-----+-----+ D (1) E (3) F (5)+-+-+ G (7)+--+-+ H (6) I (8) pre-order: ABDECFGHI inorder: DBEAFHGIC postorder: DEBHIGFCA * /