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Ingy döt Net 2023-07-01 11:58:00 -04:00
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commit cb5bb5e222
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54
Task/Display-a-linear-combination/Ada/display-a-linear-combination.ada Normal file
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with Ada.Text_Io;
with Ada.Strings.Unbounded;
with Ada.Strings.Fixed;
procedure Display_Linear is
subtype Position is Positive;
type Coefficient is new Integer;
type Combination is array (Position range <>) of Coefficient;
function Linear_Combination (Comb : Combination) return String is
use Ada.Strings.Unbounded;
use Ada.Strings;
Accu : Unbounded_String;
begin
for Pos in Comb'Range loop
case Comb (Pos) is
when Coefficient'First .. -1 =>
Append (Accu, (if Accu = "" then "-" else " - "));
when 0 => null;
when 1 .. Coefficient'Last =>
Append (Accu, (if Accu /= "" then " + " else ""));
end case;
if Comb (Pos) /= 0 then
declare
Abs_Coeff : constant Coefficient := abs Comb (Pos);
Coeff_Image : constant String := Fixed.Trim (Coefficient'Image (Abs_Coeff), Left);
Exp_Image : constant String := Fixed.Trim (Position'Image (Pos), Left);
begin
if Abs_Coeff /= 1 then
Append (Accu, Coeff_Image & "*");
end if;
Append (Accu, "e(" & Exp_Image & ")");
end;
end if;
end loop;
return (if Accu = "" then "0" else To_String (Accu));
end Linear_Combination;
use Ada.Text_Io;
begin
Put_Line (Linear_Combination ((1, 2, 3)));
Put_Line (Linear_Combination ((0, 1, 2, 3)));
Put_Line (Linear_Combination ((1, 0, 3, 4)));
Put_Line (Linear_Combination ((1, 2, 0)));
Put_Line (Linear_Combination ((0, 0, 0)));
Put_Line (Linear_Combination ((1 => 0)));
Put_Line (Linear_Combination ((1, 1, 1)));
Put_Line (Linear_Combination ((-1, -1, -1)));
Put_Line (Linear_Combination ((-1, -2, 0, -3)));
Put_Line (Linear_Combination ((1 => -1)));
end Display_Linear;