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pl:prolog:pllib:descendant [2019/06/27 15:50] (aktualna) |
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| + | ====== Descendant ====== | ||
| + | {{tag>family}} | ||
| + | ===== Description ===== | ||
| + | Program use recursion in Prolog to show ancestor-descendant relations | ||
| + | |||
| + | **Source**: Learn prolog now!, 2001, (course available on-line) | ||
| + | ===== Download ===== | ||
| + | Program source code: {{descendant.pl}} | ||
| + | ===== Listing ===== | ||
| + | <code prolog> | ||
| + | child(martha,charlotte). | ||
| + | child(charlotte,caroline). | ||
| + | child(caroline,laura). | ||
| + | child(laura,rose). | ||
| + | |||
| + | descend(X,Y):-child(X,Y). | ||
| + | descend(X,Y):-child(X,Z), | ||
| + | descend(Z,Y).</code> | ||
| + | ===== Comments ===== | ||
