How do I implement water jug problem in SWI-Prolog

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artificial-intelligence

I tried a water jug problem of 4 gallon and 3 gallon jug in SWI-Prolog but it is showing me a operator excepted error. So I kindly request you expert people to resolve the water jug problem code which i have mentioned below.

What I have tried:

I have attached a code please kindly have a look of it.
visited_state(integer,integer).


state(integer,integer).


state(2,0).

state(X,Y):- X (",4,",",Y,")\n"),
state(4,Y).


state(X,Y):- Y (",X,",",3,")\n"),
state(X,3).

state(X,Y):- X > 0,
not(visited_state(0,Y)),
assert(visited_state(X,Y)),
write("Empty the 4-Gallon jug on ground: (", X,",",Y,") -->

(", 0,",",Y,")\n"),
state(0,Y).

state(X,Y):- Y > 0,
not(visited_state(X,0)),
assert(visited_state(X,0)),
write("Empty the 3-Gallon jug on ground: (", X,",",Y,") -->

(", X,",",0,")\n"),
state(X,0).

state(X,Y):- X + Y >= 4,
Y > 0,
NEW_Y is Y - (4 - X),
not(visited_state(4,NEW_Y)),
assert(visited_state(X,Y)),
write("Pour water from 3-Gallon jug to 4-gallon until it is

full: (", X,",",Y,") --> (", 4,",",NEW_Y,")\n"),
state(4,NEW_Y).

state(X,Y):- X + Y >=3,
X > 0,
NEW_X is X - (3 - Y),
not(visited_state(X,3)),
assert(visited_state(X,Y)),
write("Pour water from 4-Gallon jug to 3-gallon until it is

full: (", X,",",Y,") --> (", NEW_X,",",3,")\n"),
state(NEW_X,3).

state(X,Y):- X + Y 0,
NEW_X is X + Y,
not(visited_state(NEW_X,0)),
assert(visited_state(X,Y)),
write("Pour all the water from 3-Gallon jug to 4-gallon:

(", X,",",Y,") --> (", NEW_X,",",0,")\n"),
state(NEW_X,0).

state(X,Y):- X+Y 0,
NEW_Y is X + Y,
not(visited_state(0,NEW_Y)),
assert(visited_state(X,Y)),
write("Pour all the water from 4-Gallon jug to 3-gallon:

(", X,",",Y,") --> (", 0,",",NEW_Y,")\n"),
state(0,NEW_Y).

state(0,2):- not(visited_state(2,0)),
assert(visited_state(0,2)),
write("Pour 2 gallons from 3-Gallon jug to 4-gallon: (",

0,",",2,") --> (", 2,",",0,")\n"),
state(2,0).

state(2,Y):- not(visited_state(0,Y)),
assert(visited_state(2,Y)),
write("Empty 2 gallons from 4-Gallon jug on the ground: (",

2,",",Y,") --> (", 0,",",Y,")\n"),
state(0,Y).

goal:-
makewindow(1,2,3,"4-3 Water Jug Problem",0,0,25,80),
state(0,0).