/euler001/Euler001.adb

pragma License ( GPL );
------------------------------------------------------------------------------
-- Author: darkestkhan                                                      --
-- Email:  darkestkhan@gmail.com                                            --
-- License: GNU GPLv3 or any later as published by Free Software Foundation --
-- ( see license.txt file )                                                 --
-- Copyright Š 2011 darkestkhan                                             --
------------------------------------------------------------------------------
-- This Program is Free Software: You Can Redistribute It and/or Modify     --
-- It Under The Terms of The GNU General Public License As Published By     --
-- The Free Software Foundation, Either Version 3 of The License, or        --
-- (at Your Option) Any Later Version.                                      --
--                                                                          --
-- This Program is Distributed in The Hope That It Will Be Useful,          --
-- But WITHOUT ANY WARRANTY; Without Even The Implied Warranty of           --
-- MERCHANTABILITY or FITNESS for A PARTICULAR PURPOSE.  See The            --
-- GNU General Public License for More Details.                             --
--                                                                          --
-- You Should Have Received A Copy of The GNU General Public License        --
-- Along with This Program.  if not, See <Http://Www.Gnu.Org/Licenses/>.    --
------------------------------------------------------------------------------
with Ada.Text_IO;
with Ada.Command_Line;
with Ada.IO_Exceptions;
procedure Euler001 is

  function Sum_Up_To ( Limit: in Integer ) return Integer is
    Sum: Natural := 0;
    I: Integer := 3;
  begin
    while I < Limit loop
      Sum := Sum + I;
      I := I + 3;
    end loop;

    I := 5;
    while I < Limit loop
      if I mod 3 /= 0 then
        Sum := Sum + I;
      end if;
      I := I + 5;
    end loop;
    return Sum;
  end Sum_Up_To;

  Sum: Integer;
  Limit: Integer;

begin

  for Index in 1 .. Ada.Command_Line.Argument_Count loop
    Limit := Integer'Value ( Ada.Command_Line.Argument ( Index ) );
    --NOTE if argument is greater than integer'range then data_error will be raised
    Sum := Sum_Up_To ( Limit => Limit  );
    Ada.Text_IO.Put_Line ( "The sum of numbers divisible by 3 or 5, but less than " & Ada.Command_Line.Argument ( Index ) & " is " & Sum'img );
  end loop;
exception
  when Ada.IO_Exceptions.Data_Error => Ada.Text_IO.Put_Line ( "One of arguments was too big. Aborting. Aborting." );
end Euler001;