--
--Erik Israelsson D1b 871102-1637 "eriis325"
--labb3
--Del B

with Ada.Text_IO;         use Ada.Text_IO;
with Ada.Integer_Text_IO; use Ada.Integer_Text_IO;
with Ada.Float_Text_IO;   use Ada.Float_Text_IO;
with Ada.Numerics.Float_Random;
with Ada.Numerics.Discrete_Random;

procedure Labb3b is
   --Arrays

   type Row_Array is
     array (1 .. 2) of Integer;

   type Cols_Array is
     array (1 .. 20) of Row_Array;

   --RandomGenerator

   procedure Generate(Columns : out Cols_Array) is
      subtype One_To_Ten is Integer range 1 .. 10;
      package One_To_Ten_Random is
         new Ada.Numerics.Discrete_Random(Result_Subtype => One_To_Ten);
      G : One_To_Ten_Random.Generator;
   begin
      One_To_Ten_Random.Reset(G);
      for I in 1 .. 2 loop
         for N in 1 .. 20 loop
            Columns(N)(I) := One_To_Ten_Random.Random(G);
         end loop;
      end loop;
   end Generate;

   --Swap
   procedure Swap(A, B : in out integer) is
      C : integer;
   begin
      C := A;
      A := B;
      B := C;
   end Swap;

   --Sort

   procedure Sort(Columns : in out Row_Array) is
   begin
      for I in (Columns'First + 1) .. Columns'Last loop
         for J in reverse I .. Columns'Last loop
            if Columns(J) < Columns(J -1) then
               Swap(Columns(J), Columns(J-1));
            end if;
         end loop;
      end loop;
   end Sort;

   Columns : Cols_Array;
   Row : Row_Array;
   I1 : Integer := 0;
begin

   Generate(Columns);
   Put("Unsorted"); New_Line(2);
   for I in 1 .. 20 loop
         Put(Columns(I)(1));
         Put(Columns(I)(2));
         New_Line;
   end loop;
   loop
      Sort(Columns(1..20)(1));
      I1 := I1+1;
      exit when I1 = 20;
      end loop;
   Put("Sorted"); New_Line(2);
   for I in 1 .. 20 loop
      Put(Columns(I)(1));
      Put(Columns(I)(2));
      New_Line;
   end loop;


end Labb3b;