Beispiel Riddle

Jan Burse, erstellt 15. Aug 2016
/**
* Prolog code for the clp(FD) record example.
* The golfer riddle itself.
*
* Adapted from Ernest Friedman Hill, 2003
* Jess in Action: Java Rule-Based Systems
* Manning Publications Co. Greenwich, CT, USA
*
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:- use_module(library(finite/clpfd)).
:- use_module(library(basic/lists)).
:- ensure_loaded(golfer).
solve(Golfers) :-
Golfers = [Fred,Joe,Bob,Tom],
new(Fred),
new(Joe),
new(Bob),
new(Tom),
all_different([position(Fred),position(Joe),position(Bob),position(Tom)]),
all_different([color(Fred),color(Joe),color(Bob),color(Tom)]),
position(Joe) #= 2,
color(Bob) #= 3, /* plaid */
position(Tom) #\= 1,
position(Tom) #\= 4,
color(Tom) #\= 4, /* orange */
member(Golfer, Golfers),
position(Golfer) #= position(Fred)+1,
color(Golfer) #= 2, /* blue */
term_variables(Golfers, L),
label(L).
% ?- solve(X).
% X = [golfer(1,4),golfer(2,2),golfer(4,3),golfer(3,1)] ;
% No

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