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-- F341A00.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 provides a simple class hierarchy (a root type and two
-- levels of derivation from it) to use in testing the basic OO features
-- related to tagged types.
--
-- CHANGE HISTORY:
-- 06 Dec 94 SAIC ACVC 2.0
--
--!
package F341A00_0 is -- package Bank
type Dollar_Amount is new Float;
type Account is tagged
record
Current_Balance: Dollar_Amount;
end record;
-- Primitive operations.
procedure Deposit (A : in out Account;
X : in Dollar_Amount);
procedure Withdrawal (A : in out Account;
X : in Dollar_Amount);
function Balance (A : in Account) return Dollar_Amount;
procedure Service_Charge (A : in out Account);
procedure Add_Interest (A : in out Account);
procedure Open (A : in out Account);
end F341A00_0;
--=================================================================--
package body F341A00_0 is
-- Primitive operations for type Account.
procedure Deposit (A : in out Account;
X : in Dollar_Amount) is
begin
A.Current_Balance := A.Current_Balance + X;
end Deposit;
--
procedure Withdrawal (A : in out Account;
X : in Dollar_Amount) is
begin
A.Current_Balance := A.Current_Balance - X;
end Withdrawal;
--
function Balance (A : in Account) return Dollar_Amount is
begin
return (A.Current_Balance);
end Balance;
--
procedure Service_Charge (A : in out Account) is
begin
A.Current_Balance := A.Current_Balance - 5.00;
end Service_Charge;
--
procedure Add_Interest (A : in out Account) is
-- No interest accumulated on this type of account.
Interest_On_Account : Dollar_Amount := 0.00;
begin
A.Current_Balance := A.Current_Balance + Interest_On_Account;
end Add_Interest;
--
procedure Open (A : in out Account) is
Initial_Deposit : Dollar_Amount := 10.00;
begin
A.Current_Balance := Initial_Deposit;
end Open;
end F341A00_0;
--=================================================================--
with F341A00_0;
package F341A00_1 is -- package Checking
package Bank renames F341A00_0;
type Account is new Bank.Account with
record
Overdraft_Fee : Bank.Dollar_Amount;
end record;
-- Inherited primitive operations.
-- procedure Deposit (A : in out Account; X : in Bank.Dollar_Amount);
-- procedure Withdrawal (A : in out Account; X : in Bank.Dollar_Amount);
-- function Balance (A : in Account) return Bank.Dollar_Amount;
-- procedure Service_Charge(A : in out Account);
-- procedure Add_Interest (A : in out Account);
-- Overridden primitive operation.
procedure Open (A : in out Account);
end F341A00_1;
--=================================================================--
package body F341A00_1 is
-- Overridden primitive operation.
procedure Open (A : in out Account) is
Check_Guarantee : Bank.Dollar_Amount := 10.00;
Initial_Deposit : Bank.Dollar_Amount := 100.00;
begin
A.Current_Balance := Initial_Deposit;
A.Overdraft_Fee := Check_Guarantee;
end Open;
end F341A00_1;
--=================================================================--
with F341A00_0; -- package Bank
with F341A00_1; -- package Checking
package F341A00_2 is -- package Interest_Checking
package Bank renames F341A00_0;
package Checking renames F341A00_1;
subtype Interest_Rate is Bank.Dollar_Amount digits 4;
Current_Rate : Interest_Rate := 0.030;
type Account is new Checking.Account with
record
Rate : Interest_Rate;
end record;
-- "Twice" inherited primitive operations (Bank.Account, Checking.Account)
-- procedure Deposit (A : in out Account; X : in Bank.Dollar_Amount);
-- procedure Withdrawal (A : in out Account; X : in Bank.Dollar_Amount);
-- function Balance (A : in Account) return Bank.Dollar_Amount;
-- procedure Service_Charge(A : in out Account);
-- Overridden primitive operations.
procedure Add_Interest (A : in out Account);
procedure Open (A : in out Account);
end F341A00_2;
--=================================================================--
package body F341A00_2 is
-- Overridden primitive operations.
procedure Add_Interest (A : in out Account) is
use type Bank.Dollar_Amount;
Interest_On_Account : Bank.Dollar_Amount
:= Bank.Dollar_Amount(A.Current_Balance * A.Rate);
begin
A.Current_Balance := A.Current_Balance + Interest_On_Account;
end Add_Interest;
procedure Open (A : in out Account) is
Initial_Deposit : Bank.Dollar_Amount := 1000.00;
begin
Checking.Open (Checking.Account (A));
A.Current_Balance := Initial_Deposit;
A.Rate := Current_Rate;
end Open;
end F341A00_2;
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