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BOOLMATH.PAS
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Pascal/Delphi Source File
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1991-02-04
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1KB
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48 lines
(* Chapter 3 - Program 6 *)
program Illustrate_What_Boolean_Math_Looks_Like;
(* notice the program name, it can be up to 63 characters long.
Variables can also be very long as we will see below *)
var A,B,C,D : boolean;
A_Very_Big_Boolean_Name_Can_Be_Used : boolean;
Junk,Who : integer;
begin
Junk := 4;
Who := 5;
A := Junk = Who; {since Junk is not equal to Who, A is false}
B := Junk = (Who - 1); {This is true}
C := Junk < Who; {This is true}
D := Junk > 10; {This is false}
A_Very_Big_Boolean_Name_Can_Be_Used := A or B; {Since B is true,
the result is true}
Writeln('result A is ',A);
Writeln('result B is ',B);
Writeln('result C is ',C);
Writeln('result D is ',D:12); {This answer will be right justified
in a 12 character field}
Writeln('result A_Very_Big_Boolean_Name_Can_Be_Used is ',
A_Very_Big_Boolean_Name_Can_Be_Used);
(* Following are a few boolean expressions. *)
A := B and C and D;
A := B and C and not D;
A := B or C or D;
A := (B and C) or not (C and D);
A := (Junk = Who - 1) or (Junk = Who);
end.
{ Result of execution
result A is FALSE
result B is TRUE
result C is TRUE
result D is FALSE
result A_Very_Big_Boolean_Name_Can_Be_Used is TRUE
}