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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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43
Task/Middle-three-digits/Ada/middle-three-digits.ada
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@ -1,43 +0,0 @@
with Ada.Text_IO;
procedure Middle_Three_Digits is
Impossible: exception;
function Middle_String(I: Integer; Middle_Size: Positive) return String is
S: constant String := Integer'Image(I);
First: Natural := S'First;
Full_Size, Border: Natural;
begin
while S(First) not in '0' .. '9' loop -- skip leading blanks and minus
First := First + 1;
end loop;
Full_Size := S'Last-First+1;
if (Full_Size < Middle_Size) or (Full_Size mod 2 = 0) then
raise Impossible;
else
Border := (Full_Size - Middle_Size)/2;
return S(First+Border .. First+Border+Middle_Size-1);
end if;
end Middle_String;
Inputs: array(Positive range <>) of Integer :=
(123, 12345, 1234567, 987654321, 10001, -10001, -123, -100, 100, -12345,
1, 2, -1, -10, 2002, -2002, 0);
Error_Message: constant String := "number of digits must be >= 3 and odd";
package IIO is new Ada.Text_IO.Integer_IO(Integer);
begin
for I in Inputs'Range loop
IIO.Put(Inputs(I), Width => 9);
Ada.Text_IO.Put(": ");
begin
Ada.Text_IO.Put(Middle_String(Inputs(I), 3));
exception
when Impossible => Ada.Text_IO.Put("****" & Error_Message & "****");
end;
Ada.Text_IO.New_Line;
end loop;
end Middle_Three_Digits;