Ada Programming/Libraries/Ada.Numerics.Discrete Random

Ada. Time-tested, safe and secure.

This language feature is available from Ada 95 on.

Ada.Numerics.Discrete_Random is a unit of the Predefined Language Environment since Ada 95.


--                     Standard Ada library specification
--   Copyright (c) 2003-2018 Maxim Reznik <>
--   Copyright (c) 2004-2016 AXE Consultants
--   Copyright (c) 2004, 2005, 2006 Ada-Europe
--   Copyright (c) 2000 The MITRE Corporation, Inc.
--   Copyright (c) 1992, 1993, 1994, 1995 Intermetrics, Inc.
--   SPDX-License-Identifier: BSD-3-Clause and LicenseRef-AdaReferenceManual
-- -------------------------------------------------------------------------

   type Result_Subtype is (<>);
package Ada.Numerics.Discrete_Random is

   --  Basic facilities

   type Generator is limited private;

   function Random (Gen : Generator) return Result_Subtype;

   procedure Reset (Gen       : in Generator;
                    Initiator : in Integer);
   procedure Reset (Gen       : in Generator);

   --  Advanced facilities

   type State is private;

   procedure Save  (Gen        : in  Generator;
                    To_State   : out State);
   procedure Reset (Gen        : in  Generator;
                    From_State : in  State);

   Max_Image_Width : constant := implementation_defined;

   function Image (Of_State    : State)  return String;
   function Value (Coded_State : String) return State;


   pragma Import (Ada, State);
   pragma Import (Ada, Generator);

end Ada.Numerics.Discrete_Random;

See alsoEdit


External examplesEdit

Ada Reference ManualEdit

Ada 95Edit

Ada 2005Edit

Ada 2012Edit

Open-Source ImplementationsEdit