1 files changed, 8 insertions, 5 deletions
diff --git a/tit4tat.pl b/tit4tat.pl
index 5eb54f4..85df991 100644
--- a/tit4tat.pl
+++ b/tit4tat.pl
@@ -20,7 +20,7 @@ pay(d,d,2).
 pay(c,c,3).
 pay(d,c,4).
 
-step(A, B, PAY_A, PAY_B) :- 
+step(A, B, PAY_A, PAY_B) :-
 	pay(A, B, PAY_A),
 	pay(B, A, PAY_B).
 
@@ -33,12 +33,15 @@ tit4tat(A, Hist, PayA, PayB) :-
 	tit4tat_select(Old, Hist),
 	step(A, Old, PayA, PayB).
 
-loop(end, [_]).
+loop(end, _).
 loop(End, Hist):- End\=end,
-	write('Type c,d or end to end: '), read(Word),
-	tit4tat(Word, Hist, PAY_A, PAY_B),
+	write('Type c,d or end to end: '), read(Choice),
+
+	tit4tat(Choice, Hist, PAY_A, PAY_B),
+
 	write('A Pay: '),write(PAY_A),nl,
 	write('B Pay: '),write(PAY_B),nl,
-	loop(Word, [Word|Hist]). 
+
+	loop(Choice, [Choice|Hist]). 
 	
 start:-loop(noend, []).