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Ingy döt Net 2026-02-01 16:33:20 -08:00
parent 5150844a7d
commit 4bb20c9b71
7735 changed files with 38060 additions and 199180 deletions
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45
Task/Nim-game/Ada/nim-game.ada
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with Ada.Text_IO;
procedure Nim is
subtype Token_Range is Positive range 1 .. 3;
package TIO renames Ada.Text_IO;
package Token_IO is new TIO.Integer_IO(Token_Range);
procedure Get_Tokens(remaining : in Natural; how_many : out Token_Range) is
begin
loop
TIO.Put("How many tokens would you like to take? ");
begin
Token_IO.Get(TIO.Standard_Input, how_many);
exit when how_many < remaining;
raise Constraint_Error;
exception
when TIO.Data_Error | Constraint_Error =>
if not TIO.End_Of_Line(TIO.Standard_Input) then
TIO.Skip_Line(TIO.Standard_Input);
end if;
TIO.Put_Line("Invalid input.");
end;
end loop;
end;
tokens : Natural := 12;
how_many : Token_Range;
begin
loop
TIO.Put_Line(tokens'Img & " tokens remain.");
-- no exit condition here: human cannot win.
Get_Tokens(tokens, how_many);
TIO.Put_Line("Human takes" & how_many'Img & " tokens.");
tokens := tokens - how_many;
-- computer's turn: take the remaining N tokens to amount to 4.
how_many := tokens mod 4;
TIO.Put_Line("Computer takes" & how_many'Img & " tokens.");
tokens := tokens - how_many;
Ada.Text_IO.New_Line;
exit when tokens = 0;
end loop;
TIO.Put_Line("Computer won!");
end Nim;