Which traversal method for a binary tree does the following Pascal code illustrate? Procedure traverse(p：pointer)； Begin Ifp<>NIL Then begin Traverse (p^．left)； Process(p)； Traverse(p^．right) End； End_A．pre_orderB．middle_orderC．noneD．last_order

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Which traversal method for a binary tree does the following Pascal code illustrate? Procedure traverse(p：pointer)； Begin Ifp<>NIL Then begin Traverse (p^．left)； Process(p)； Traverse(p^．right) End； End_

A．pre_order

B．middle_order

C．none

D．last_order

参考答案和解析

正确答案：B

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Which traversal method for a binary tree does the following Pascal code illustrate? Proc

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