function stiff_exact_test ( )

%*****************************************************************************80
%
%% stiff_exact_test() tests stiff_exact().
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    15 June 2025
%
%  Author:
%
%    John Burkardt
%
  addpath ( '../stiff_exact' );

  timestamp ( );
  fprintf ( 1, '\n' );
  fprintf ( 1, 'stiff_exact_test()\n' );
  fprintf ( 1, '  MATLAB/Octave version "%s"\n', version ( ) );
  fprintf ( 1, '  Test stiff_exact(), which evaluates exact solutions\n' );
  fprintf ( 1, '  of the stiff ODE.\n' );

  [ lambda, t0, y0, tstop ] = stiff_parameters ( );
  fprintf ( 1, '\n' );
  fprintf ( 1, '  parameters:\n' );
  fprintf ( 1, '    lambda = %g\n', lambda );
  fprintf ( 1, '    t0     = %g\n', t0 );
  fprintf ( 1, '    y0     = %g\n', y0 );
  fprintf ( 1, '    tstop  = %g\n', tstop );

  stiff_value ( );

  stiff_ode45 ( );
%
%  Terminate.
%
  fprintf ( 1, '\n' );
  fprintf ( 1, 'stiff_exact_test():\n' );
  fprintf ( 1, '  Normal end of execution.\n' );
  timestamp ( );

  rmpath ( '../stiff_exact' );

  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

