function spring_double_ode_test ( )

%*****************************************************************************80
%
%% spring_double_ode_test() solves spring_double_ode().
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    29 May 2021
%
%  Author:
%
%    John Burkardt
%
  addpath ( '../spring_double_ode' );

  timestamp ( );
  fprintf ( 1, '\n' );
  fprintf ( 1, 'spring_double_ode_test():\n' );
  fprintf ( 1, '  MATLAB/Octave version %s\n', version ( ) );
  fprintf ( 1, '  Solve spring_double_ode().\n' );

  [ m1, m2, k1, k2, t0, y0, tstop ] = spring_double_parameters ( );

  fprintf ( 1, '\n' );
  fprintf ( 1, '  parameters:\n' );
  fprintf ( 1, '    mass #1      = %g\n', m1 );
  fprintf ( 1, '    mass #2      = %g\n', m2 );
  fprintf ( 1, '    stiffness #1 = %g\n', k1 );
  fprintf ( 1, '    stiffness #2 = %g\n', k2 );
  fprintf ( 1, '    t0           = %g\n', t0 );
  fprintf ( 1, '    u0           = [%g,%g,%g,%g]\n', y0 );
  fprintf ( 1, '    tstop        = %g\n', tstop );

  spring_double_ode23 ( );
%
%  Terminate.
%
  fprintf ( 1, '\n' );
  fprintf ( 1, 'spring_double_ode_test():\n' );
  fprintf ( 1, '  Normal end of execution.\n' );
  fprintf ( 1, '\n' );
  timestamp ( );

  rmpath ( '../spring_double_ode' );

  return
end
function timestamp ( )

%*****************************************************************************80
%
%% timestamp() prints the current YMDHMS date as a timestamp.
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    14 February 2003
%
%  Author:
%
%    John Burkardt
%
  t = now;
  c = datevec ( t );
  s = datestr ( c, 0 );
  fprintf ( 1, '%s\n', s );

  return
end
