[Surface] to prove safety questions offer the next node in the binary tree 8

Interview questions 8. next node binary tree


Title Description
Given a binary tree and a node which is, how to find the next node in a preorder traversal order? In addition to the node in the tree are pointers to two child nodes other than the left and right, as well as a pointer pointing to the parent node.

Java implementation

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Origin www.cnblogs.com/hglibin/p/10930092.html