First understand the concept: Preorder traversal: the operation to access the root node occurs before the left and right subtrees are traversed. Middle order traversal: the operation to access the root node occurs in the left and right subtrees. Sequential traversal: the operation to access the root node occurs after traversing the left and right subtrees. Eg: the following sequence traverses to DBCEFGHA, and the sequence traversal is EDCBAHFG, and the preorder traversal (online example) Solution: first, see the back order traversal DBCEFGHA, A is the total root node. Then find the middle order traversing the position of A in EDCBAHFG, then EDCB in the left branch of A, and HFG in the right branch of A; Repeat the first two steps, the last one from the back order traversal, searching the corresponding points in the middle order traversal, and the left and right branches... Finally, AECDBHGF can be verified by itself.

Filename	Size	Update
二叉树中+后 求先	0	2018-04-20
二叉树中+后 求先\Debug	0	2018-04-20
二叉树中+后 求先\Debug\中+后 求先.exe	32256	2018-04-20
二叉树中+后 求先\Debug\中+后 求先.ilk	235828	2018-04-20
二叉树中+后 求先\Debug\中+后 求先.pdb	593920	2018-04-20
二叉树中+后 求先\中+后 求先	0	2018-04-20
二叉树中+后 求先\中+后 求先.sdf	2097152	2018-04-20
二叉树中+后 求先\中+后 求先.sln	988	2018-04-19
二叉树中+后 求先\中+后 求先.v12.suo	17920	2018-04-20
二叉树中+后 求先\中+后 求先\Debug	0	2018-04-20
二叉树中+后 求先\中+后 求先\Debug\vc120.idb	35840	2018-04-20
二叉树中+后 求先\中+后 求先\Debug\vc120.pdb	77824	2018-04-20
二叉树中+后 求先\中+后 求先\Debug\中+后 求先.log	2227	2018-04-20
二叉树中+后 求先\中+后 求先\Debug\中+后 求先.tlog	0	2018-04-20
二叉树中+后 求先\中+后 求先\Debug\中+后 求先.tlog\cl.command.1.tlog	586	2018-04-20
二叉树中+后 求先\中+后 求先\Debug\中+后 求先.tlog\CL.read.1.tlog	1582	2018-04-20
二叉树中+后 求先\中+后 求先\Debug\中+后 求先.tlog\CL.write.1.tlog	384	2018-04-20
二叉树中+后 求先\中+后 求先\Debug\中+后 求先.tlog\link.command.1.tlog	1058	2018-04-20
二叉树中+后 求先\中+后 求先\Debug\中+后 求先.tlog\link.read.1.tlog	2366	2018-04-20
二叉树中+后 求先\中+后 求先\Debug\中+后 求先.tlog\link.write.1.tlog	368	2018-04-20
二叉树中+后 求先\中+后 求先\Debug\中+后 求先.tlog\中+后 求先.lastbuildstate	172	2018-04-20
二叉树中+后 求先\中+后 求先\Debug\源.obj	8931	2018-04-20
二叉树中+后 求先\中+后 求先\中+后 求先.vcxproj	4022	2018-04-19
二叉树中+后 求先\中+后 求先\中+后 求先.vcxproj.filters	944	2018-04-19
二叉树中+后 求先\中+后 求先\源.cpp	1083	2018-04-20

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