#!/usr/local/bin/perl
use
lib (
'../lib/'
,
'lib'
);
my
$database
= Parser->consult(
<<'END_PROLOG');
perform(grasp,
state(middle, middle, onbox, hasnot),
state(middle, middle, onbox, has)).
perform(climb,
state(MP, BP, onfloor, H),
state(MP, BP, onbox, H)).
perform(push(P1,P2),
state(P1, P1, onfloor, H),
state(P2, P2, onfloor, H)).
perform(walk(P1,P2),
state(P1, BP, onfloor, H),
state(P2, BP, onfloor, H)).
getfood(state(Bogus1,Bogus2,Bogus3,has)).
getfood(S1) :- perform(Act, S1, S2),
nl, print('In '), print(S1), print(' try '), print(Act), nl,
getfood(S2).
END_PROLOG
my
$parser
= Parser->new(
"getfood(state(atdoor,atwindow,onfloor,hasnot))."
);
my
$query
= Term->new(
$parser
);
my
$engine
= Engine->new(
$query
,
$database
);
Engine->formatted(1);
print
$engine
->results;