(* Copyright (C) 2020 Free Software Foundation, Inc. *)
(* This file is part of GNU Modula-2.

GNU Modula-2 is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
Software Foundation; either version 2, or (at your option) any later
version.

GNU Modula-2 is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
for more details.

You should have received a copy of the GNU General Public License along
with gm2; see the file COPYING.  If not, write to the Free Software
Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *)

MODULE tinycabs ;

FROM libc IMPORT printf ;

PROCEDURE cabs (z: COMPLEX) : REAL ;
BEGIN
   RETURN ABS (RE (z)) + ABS (IM (z))
END cabs ;

VAR
   r: REAL ;
   z: COMPLEX ;
BEGIN
   z := CMPLX (1.0, 2.0) ;
   r := cabs (z) ;
   printf ("abs value is %g\n", r)
END tinycabs.