function r8_lgams_test ( )

%*****************************************************************************80
%
%% R8_LGAMS_TEST tests R8_LGAMS.
%
%  Licensing:
%
%    This code is distributed under the GNU LGPL license.
%
%  Modified:
%
%    01 May 2016
%
%  Author:
%
%    John Burkardt
%
  addpath ( '../test_values' );

  fprintf ( 1, '\n' );
  fprintf ( 1, 'R8_LGAMS_TEST:\n' );
  fprintf ( 1, '  R8_LGAMS evaluates the sign of Gamma(x) and\n' );
  fprintf ( 1, '  the logarithm of the absolute value of Gamma(x).\n' );
  fprintf ( 1, '\n' );
  fprintf ( 1, '             X        LNGAM(X)  Sign(Gamma(x))   Log(|Gamma(x)|)        Diff\n' );
  fprintf ( 1, '\n' );

  n_data = 0;

  while ( 1 )

    [ n_data, x, fx1 ] = gamma_log_values ( n_data );

    if ( n_data == 0 )
      break
    end

    [ fx2, slngam ] = r8_lgams ( x );

    fprintf ( 1, '  %14.6g  %14.6g  %14.6g  %14.6g  %14.6g\n', ...
      x, fx1, slngam, fx2, abs ( fx1 - fx2 ) );

  end

  rmpath ( '../test_values' );

  return
end
