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Task/Monty-Hall-problem/NetRexx/monty-hall-problem.netrexx

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+/* NetRexx ************************************************************
+* 30.08.2013 Walter Pachl  translated from Java/REXX/PL/I
+**********************************************************************/
+options replace format comments java crossref savelog symbols nobinary
+
+doors = create_doors
+switchWins = 0
+stayWins = 0
+shown=0
+Loop plays=1 To 1000000
+  doors=0
+  r=r3()
+  doors[r]=1
+  choice = r3()
+  loop Until shown<>choice & doors[shown]=0
+    shown  = r3()
+    End
+  If doors[choice]=1 Then
+    stayWins=stayWins+1
+  Else
+    switchWins=switchWins+1
+  End
+Say "Switching wins " switchWins " times."
+Say "Staying wins   " stayWins   " times."
+
+method create_doors static returns Rexx
+  doors = ''
+  doors[0] = 0
+  doors[1] = 0
+  doors[2] = 0
+  return doors
+
+method r3 static
+  rand=random()
+  return rand.nextInt(3) + 1