Ada Programming/Attributes/'Adjacent
Description
[edit | edit source]S'Adjacent(X, T) is an Ada attribute where X is any floating point type.
'Adjacent returns the adjacent floating point number to X in the direction of T.
Example
[edit | edit source]with Ada.Text_IO;
procedure Adjacent is
package T_IO renames Ada.Text_IO;
package F_IO is new Ada.Text_IO.Float_IO (Float);
X : Float := 1.0;
begin
T_IO.Put (" X = ");
F_IO.Put(Item => X, Aft => 10, Exp => 0);
T_IO.New_Line;
T_IO.Put ("Float'Adjacent(X, Float'First) = ");
F_IO.Put(Item => Float'Adjacent(X, Float'First), Aft => 10, Exp => 0);
T_IO.New_Line;
T_IO.Put ("Float'Adjacent(X, Float'Last) = ");
F_IO.Put(Item => Float'Adjacent(X, Float'Last), Aft => 10, Exp => 0);
T_IO.New_Line;
end Adjacent;
The output with GNAT 4.6 on the x86-64 architecture is:
X = 1.0000000000 Float'Adjacent(X, Float'First) = 0.9999999404 Float'Adjacent(X, Float'Last) = 1.0000001192