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Ingy döt Net 2013-04-10 12:38:42 -07:00
parent 3af7344581
commit 86c034bb8b
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5
Task/Knuth-shuffle/Ada/knuth-shuffle-1.ada Normal file
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generic
type Element_Type is private;
type Array_Type is array (Positive range <>) of Element_Type;
procedure Generic_Shuffle (List : in out Array_Type);

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Task/Knuth-shuffle/Ada/knuth-shuffle-2.ada Normal file
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with Ada.Numerics.Discrete_Random;
procedure Generic_Shuffle (List : in out Array_Type) is
package Discrete_Random is new Ada.Numerics.Discrete_Random(Result_Subtype => Integer);
use Discrete_Random;
K : Integer;
G : Generator;
T : Element_Type;
begin
Reset (G);
for I in reverse List'Range loop
K := (Random(G) mod I) + 1;
T := List(I);
List(I) := List(K);
List(K) := T;
end loop;
end Generic_Shuffle;

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Task/Knuth-shuffle/Ada/knuth-shuffle-3.ada Normal file
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with Ada.Text_IO;
with Generic_Shuffle;
procedure Test_Shuffle is
type Integer_Array is array (Positive range <>) of Integer;
Integer_List : Integer_Array
:= (1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18);
procedure Integer_Shuffle is new Generic_Shuffle(Element_Type => Integer,
Array_Type => Integer_Array);
begin
for I in Integer_List'Range loop
Ada.Text_IO.Put(Integer'Image(Integer_List(I)));
end loop;
Integer_Shuffle(List => Integer_List);
Ada.Text_IO.New_Line;
for I in Integer_List'Range loop
Ada.Text_IO.Put(Integer'Image(Integer_List(I)));
end loop;
end Test_Shuffle;