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pl:prolog:pllib:tree_member [2019/06/27 15:50] (aktualna) |
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| + | ====== Tree member ====== | ||
| + | {{tag>trees recursion}} | ||
| + | ===== Description ===== | ||
| + | |||
| + | |||
| + | **Source**: The Art of Prolog | ||
| + | ===== Download ===== | ||
| + | Program source code: {{tree_member.pl}} | ||
| + | ===== Listing ===== | ||
| + | <code prolog> | ||
| + | /* | ||
| + | tree_member(Element,Tree):- | ||
| + | Element is an element of the binary tree Tree | ||
| + | */ | ||
| + | tree_member(X,tree(X,Left,Right)). | ||
| + | tree_member(X,tree(Y,Left,Right)) :- tree_member(X,Left). | ||
| + | tree_member(X,tree(Y,Left,Right)) :- tree_member(X,Right). | ||
| + | |||
| + | % Program 3.24: Testing tree membership | ||
| + | |||
| + | </code> | ||
| + | ===== Comments ===== | ||
