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MODULE Ch2 EXPORTS Main;
IMPORT IO;
VAR
A1:ARRAY[0..5] OF INTEGER := ARRAY OF INTEGER{1,5,1,1,6,4};
A2:ARRAY[0..5] OF INTEGER := ARRAY OF INTEGER{1,3,2,2,3,1};
PROCEDURE Swap(VAR A,B:INTEGER) =
VAR Temp:INTEGER := A;
BEGIN
A := B;
B := Temp;
END Swap;
PROCEDURE PrintArray(VAR Arr:ARRAY OF INTEGER) =
BEGIN
FOR I := FIRST(Arr) TO LAST(Arr) DO
IO.PutInt(Arr[I]); IO.PutChar(' ');
END;
IO.Put("\n");
END PrintArray;
PROCEDURE WiggleSort(VAR Arr:ARRAY OF INTEGER) =
BEGIN
FOR I := FIRST(Arr) TO LAST(Arr)-1 DO
IF((I MOD 2 = 0) = (Arr[I] > Arr[I+1])) THEN Swap(Arr[I],Arr[I+1]); END;
END;
END WiggleSort;
BEGIN
WiggleSort(A1);
WiggleSort(A2);
PrintArray(A1);
PrintArray(A2);
END Ch2.
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