'(prolog）How to find the define child and parent relationship in a binary tree in prolog?
For example:
for binary tree bt(left,root,left)
define a relationship rule:
relationship(bt,parent,child) to find the child of the parent or the parent of child in bt.
eg:
-? relationship(bt(nil,4,5),4,child)
4 is the parent. so, the child is 5.
How to define the rules of this relationship in prolog?
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