# -*- coding: cp936 -*-#---------------------------------------------# # author chile # version 1.0 # date 2014-02-17 # desc 二叉树 # # # #---------------------------------------------class bintree: def __init__(self): self.root = None # 前驱节点 def treePredecessor(self,entry): if entry.left != None: return self.maxTree(entry.left) preNode = entry.parent tempNode = entry while preNode != None and preNode.right.value != entry.value: tempNode = preNode preNode = preNode.parent return preNode #后继节点 def treeSuccessor(self,entry): if entry.right != None: return self.minTree(entry.right) preNode = entry.parent tempNode = entry while preNode != None and preNode.left.value != entry.value: tempNode = preNode preNode = preNode.parent return preNode def add(self,value): tempNode = self.root parentNode = None entry = bintree.entry(value = value) while tempNode != None: parentNode = tempNode if cmp(value,parentNode.value)
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