100 lines
3.0 KiB
Plaintext
100 lines
3.0 KiB
Plaintext
-- FC51A00.A
|
|
--
|
|
-- Grant of Unlimited Rights
|
|
--
|
|
-- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687,
|
|
-- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained
|
|
-- unlimited rights in the software and documentation contained herein.
|
|
-- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making
|
|
-- this public release, the Government intends to confer upon all
|
|
-- recipients unlimited rights equal to those held by the Government.
|
|
-- These rights include rights to use, duplicate, release or disclose the
|
|
-- released technical data and computer software in whole or in part, in
|
|
-- any manner and for any purpose whatsoever, and to have or permit others
|
|
-- to do so.
|
|
--
|
|
-- DISCLAIMER
|
|
--
|
|
-- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR
|
|
-- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED
|
|
-- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE
|
|
-- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE
|
|
-- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A
|
|
-- PARTICULAR PURPOSE OF SAID MATERIAL.
|
|
--*
|
|
--
|
|
-- FOUNDATION DESCRIPTION:
|
|
-- This foundation defines a fraction type abstraction. Fractions are
|
|
-- implemented as records with two scalar components: a numerator
|
|
-- of type integer and a denominator of type positive. Fractions are
|
|
-- created via an overloaded "/" operator.
|
|
--
|
|
-- CHANGE HISTORY:
|
|
-- 06 Dec 94 SAIC ACVC 2.0
|
|
--
|
|
--!
|
|
|
|
package FC51A00 is -- Fraction type abstraction.
|
|
|
|
type Fraction_Type is private;
|
|
|
|
-- Create a fraction object by integer division.
|
|
function "/" (Left, Right : Integer) return Fraction_Type;
|
|
|
|
-- Change the sign of a fraction.
|
|
function "-" (Frac : Fraction_Type) return Fraction_Type;
|
|
|
|
-- Return value of numerator as integer.
|
|
function Numerator (Frac : Fraction_Type) return Integer;
|
|
|
|
-- Return value of denominator as integer.
|
|
function Denominator (Frac : Fraction_Type) return Integer;
|
|
|
|
-- ... Other operations on fraction types.
|
|
|
|
private
|
|
|
|
type Fraction_Type is record
|
|
Numerator : Integer;
|
|
Denominator : Positive;
|
|
end record;
|
|
|
|
end FC51A00;
|
|
|
|
|
|
--==================================================================--
|
|
|
|
|
|
package body FC51A00 is
|
|
|
|
function "/" (Left, Right : Integer) return Fraction_Type is
|
|
Result : Fraction_Type;
|
|
begin
|
|
Result.Numerator := Left;
|
|
Result.Denominator := Right;
|
|
return Result;
|
|
end "/";
|
|
|
|
|
|
function "-" (Frac : Fraction_Type) return Fraction_Type is
|
|
Result : Fraction_Type := Frac;
|
|
begin
|
|
Result.Numerator := -(Result.Numerator);
|
|
return Result;
|
|
end "-";
|
|
|
|
|
|
function Numerator (Frac : Fraction_Type) return Integer is
|
|
begin
|
|
return (Frac.Numerator);
|
|
end Numerator;
|
|
|
|
|
|
function Denominator (Frac : Fraction_Type) return Integer is
|
|
begin
|
|
return (Frac.Denominator);
|
|
end Denominator;
|
|
|
|
|
|
end FC51A00;
|