ada import c function

["s. ashen" <spain.ashen@gmail.com>]

Does anyone import C function to ada??
Using gnat 3.15, i try to compile the example which contain two files
  use_of_import.adb

procedure Use_Of_Import is
   procedure Imported_Function;
   pragma Import (C, Imported_Function, "imported_function");
begin
   Imported_Function;
end Use_Of_Import;

  imported_function.c

#include <stdio.h>
imported_function ()
{
  printf ("\nI am now in the imported function\n\n");
}

does anyone know how to compile this program, i had tried many in many
ways, but i can't do this.. always occurred some  errors.