Copyright (C) 2001-2004 Roberto Bagnara <bagnara@cs.unipr.it>
this program is free software, covered by the GNU General Public License,
and you are welcome to change it and/or distribute copies of it
under certain conditions.
Type "copying" to see the conditions.
There is ABSOLUTELY NO WARRANTY for this program.
Type "warranty" for details.
PPL clpq ?- yes
PPL clpq ?- Z = 5
 more? yes
PPL clpq ?- yes
PPL clpq ?- X = 0
Y - Z = -1
 more? yes
PPL clpq ?- yes
PPL clpq ?- Y = 102
 more? yes
PPL clpq ?- yes
PPL clpq ?- Y = 8
 more? yes
PPL clpq ?- yes
PPL clpq ?- E >= 0
Y =< 9
-E + Y >= 0
S = 9
E + D - Y = 0
E - N = 0
M = 1
O = 0
R = 0
 more? yes
PPL clpq ?- yes
PPL clpq ?- X = 10
 more? yes
PPL clpq ?-