Convert binary sort tree to orderly two-way linked list (input from the keyboard or files a number of points, constructing binary sort tree, and then the tree can be converted into an orderly two-way linked list, and sequentially output bidirectional chain value of each node in the table,)
To solve the relevant code

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In the sequence traversal,,,,,,,

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Classic topic: the problem is data structures to a binary sort tree transformation for a binary linked list in ascending order,