ex5: task 1

2025-11-04 18:04:52 +01:00
parent 51b98487fe
commit 61b5f5abed
1 changed files with 23 additions and 0 deletions
@@ -0,0 +1,23 @@
+:- use_module(library(clpfd)).
+:- initialization(main).
+
+main :-
+    findall([Ones,Fives,Tens,Twenties], 
+            (payment(25, [coin(Ones,1,11),coin(Fives,5,4),coin(Tens,10,3),coin(Twenties,20,2)]), label([Ones,Fives,Tens,Twenties])), 
+            Solutions),
+    forall(member(Sol, Solutions), (write('Solution: '), writeln(Sol))).
+
+payment(Sum, Coins) :-
+    payment_acc(0, Sum, Coins).
+
+payment_acc(Acc, Sum, []) :-
+    Acc #= Sum.
+
+payment_acc(Acc, Sum, [coin(Count, Value, Available)|Tail]) :-
+    Count in 0..Available,
+    NewAcc #= Acc + Count * Value,
+    payment_acc(NewAcc, Sum, Tail).
+
+?- payment(25, [coin(Ones,1,11),coin(Fives,5,4),coin(Tens,10,3),coin(Twenties,20,2)]).
+?- payment(25, [coin(Ones,1,11),coin(Fives,5,4),coin(Tens,10,3),coin(Twenties,20,2)]), label([Ones, Fives, Tens, Twenties]).
+