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1987-02-08
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(* Chapter 3 - Program 5 *)
MODULE BoolMath;
VAR IsIt, WillIt, What : BOOLEAN;
A, B, C : INTEGER;
BEGIN
A := 22; (* Assign some values to work with *)
B := 12;
C := -12;
IsIt := A = 22; (* TRUE - equal to *)
IsIt := A = 23; (* FALSE - equal to *)
WillIt := A > B; (* TRUE - greater than *)
WillIt := A < B; (* FALSE - less than *)
What := WillIt; (* FALSE - assignment *)
IsIt := B <= 12; (* TRUE - less than or equal *)
IsIt := B >= 4; (* TRUE - greater than or equal *)
IsIt := A # B; (* FALSE - not equal *)
IsIt := A <> B; (* TRUE - not equal *)
IsIt := TRUE;
What := FALSE;
WillIt := IsIt AND What; (* FALSE because What is FALSE *)
WillIt := IsIt AND NOT What; (* TRUE *)
WillIt := IsIt OR What; (* TRUE because one is TRUE *)
WillIt := NOT IsIt OR What; (* FALSE *)
IsIt := (A = B) OR (B = C) OR (A = 22);
IsIt := ((A < B) AND (B < C)) OR NOT (B > C);
(* We have not studied a way to print out representations of *)
(* BOOLEAN variables so it will have to wait. *)
END BoolMath.