function pendulum_ode_test ( )

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

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

  [ g, l, m, t0, y0, tstop ] = pendulum_parameters ( );

  p = pendulum_period ( );

  fprintf ( 1, '\n' );
  fprintf ( 1, '  parameters:\n' );
  fprintf ( 1, '    gravity (m/s^2) = %g\n', g );
  fprintf ( 1, '    length (m)      = %g\n', l );
  fprintf ( 1, '    mass (g)        = %g\n', m );
  fprintf ( 1, '    t0 (s)          = %g\n', t0 );
  fprintf ( 1, '    u0 (rad)        = %g\n', y0(1) );
  fprintf ( 1, '    v0 (rad/s)      = %g\n', y0(2) );
  fprintf ( 1, '    tstop (s)       = %g\n', tstop );
  fprintf ( 1, '    p (s)           = %g\n', p );

  pendulum_ode23 ( );
%
%  Terminate.
%
  fprintf ( 1, '\n' );
  fprintf ( 1, 'pendulum_ode_test():\n' );
  fprintf ( 1, '  Normal end of execution.\n' );
  fprintf ( 1, '\n' );
  timestamp ( );

  rmpath ( '../pendulum_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

