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# Prolog program of water jug problem

Posted By: Milind Mishra     Category: Artificial Intelligence     Views: 19307

## Code for Prolog program of water jug problem in Artificial Intelligence

```domains
x,y=integer.
predicates
f(x,y).
clauses
f(2,Y):-write("\n 2 0\n").
f(X,2):-write("\n 0 2\n").

f(X,Y):-Y=0,X<>4,!,
write("\n ",X," 3"),
f(X,3).

f(X,Y):-X=0,Y<>3,!,
write("\n 4 ",Y),
f(4,Y).

f(X,Y):-X+Y>=4,Y>0,X<>4,!,
Y1=Y-4+X,
write("\n 4 ",Y1),
f(4,Y1);X+Y>=4,Y>0,Y<>3,!,
Y1=Y-4+X,
write("\n 4 ",Y1),
f(4,Y1).

f(X,Y):-X+Y>=3,X>0,X<>4,!,
X1=X-3+Y,
write("\n ",X1," 3"),
f(X1,3);X+Y>=3,X>0,Y<>3,!,
X1=X-3+Y,
write("\n ",X1," 3"),
f(X1,3).

f(X,Y):-X+Y<=4,Y>0,!,
X1=X+Y,
write("\n ",X1," 0"),
f(X1,0).

f(X,Y):-X+Y<=3,X>0,!,
Y1=X+Y,
write("\n 0 ",Y1),
f(0,Y1).

f(X,Y):-X>0,!,
write("\n 0 ",Y),
f(0,Y).

f(X,Y):-Y>0,!,
write("\n ",X," 0"),
f(X,0).
```
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 Milind Mishra author of Prolog program of water jug problem is from India. View All Articles

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 Malik Khoja from United States Comment on: Feb 29 On compilation it gives me error saying:water1.pl:2:1: Syntax error: Operator expectedwater1.pl:4:3: Syntax error: Operator expectedwater1.pl:8:3: Syntax error: Operator expectedwater1.pl:49:23: Syntax error: Operator expectedwater1.pl:57:20: Syntax error: Operator expectedwater1.pl:76:3: Syntax error: Operator expectedCan anyone help?