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/*
* Copyright (c) 2012 Benjamin Franzke <benjaminfranzke@googlemail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
pay(c,d,1).
pay(d,d,2).
pay(c,c,3).
pay(d,c,4).
step(A, B, PAY_A, PAY_B) :-
pay(A, B, PAY_A),
pay(B, A, PAY_B).
loop(end).
loop(OLD):- OLD\=end,
write('Type c,d or end to end: '), read(Word),
step(Word, OLD, PAY_A, PAY_B),
write('A Pay: '),write(PAY_A),nl, write('B Pay: '),write(PAY_B),nl,
loop(Word).
start:-loop(c).
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