Maximum difference between adjacent elements of list: Difference between revisions
Maximum difference between adjacent elements of list (view source)
Revision as of 13:07, 26 April 2023
, 1 year agoAdded Ada solution
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AbsDiff(1.5E+31, 5E+30) = 1.0E+31
AbsDiff(5E+30, -5E+30) = 1.0E+31
</pre>
=={{header|Ada}}==
<syntaxhighlight lang="algol68">
-- Find the maximum absolute difference between adjacent values in a list, and output all pairs with that difference
-- J. Carter 2023 Apr
-- Uses the PragmAda Reusable Components (https://github.com/jrcarter/PragmARC)
with Ada.Text_IO;
with PragmARC.Images;
procedure List_Max_Diff is
function Float_Image is new PragmARC.Images.Float_Image (Number => Float);
function Image (Number : in Float) return String;
-- Returns the image of Number without a decimal point or fractional digits if the fractional part is zero
function Image (Number : in Float) return String is
Result : constant String := Float_Image (Number, Aft => 0, Exp => 0);
begin -- Image
if Result'Length > 1 and then Result (Result'Last - 1 .. Result'Last) = ".0" then
return Result (Result'First .. Result'Last - 2);
end if;
return Result;
end Image;
type Float_List is array (Positive range <>) of Float with Dynamic_Predicate => Float_List'First = 1;
List : constant Float_List := (1.0, 8.0, 2.0, -3.0, 0.0, 1.0, 1.0, -2.3, 0.0, 5.5, 8.0, 6.0, 2.0, 9.0, 11.0, 10.0, 3.0);
Max : Float := -1.0;
begin -- List_Max_Diff
Find : for I in 1 .. List'Last - 1 loop
Max := Float'Max (abs (List (I) - List (I + 1) ), Max);
end loop Find;
Print : for I in 1 .. List'Last - 1 loop
if abs (List (I) - List (I + 1) ) = Max then
Ada.Text_IO.Put_Line (Item => Image (List (I) ) & ',' & Image (List (I + 1) ) & " ==> " & Image (Max) );
end if;
end loop Print;
end List_Max_Diff;
</syntaxhighlight>
{{out}}
<pre>
1,8 ==> 7
2,9 ==> 7
10,3 ==> 7
</pre>
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