f341a00.a

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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;