Depth-first search 3


A depth-limited, depth-first search program.

Source: PROLOG programming for artificial intelligence, 3rd Edition, Harlow, 2001, ISBN 0-201-40375-7.


Program source code:


% Figure 11.8   A depth-limited, depth-first search program.
% depthfirst2( Node, Solution, Maxdepth):
%   Solution is a path, not longer than Maxdepth, from Node to a goal
depthfirst2( Node, [Node], _)  :-
   goal( Node).
depthfirst2( Node, [Node | Sol], Maxdepth)  :-
   Maxdepth > 0,
   s( Node, Node1),
   Max1 is Maxdepth - 1,
   depthfirst2( Node1, Sol, Max1).


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