function laplace_cdf_test ( )

%*****************************************************************************80
%
%% LAPLACE_CDF_TEST tests LAPLACE_CDF, LAPLACE_CDF_INV, LAPLACE_PDF.
%
%  Licensing:
%
%    This code is distributed under the GNU LGPL license.
%
%  Modified:
%
%    26 March 2016
%
%  Author:
%
%    John Burkardt
%
  fprintf ( 1, '\n' );
  fprintf ( 1, 'LAPLACE_CDF_TEST\n' );
  fprintf ( 1, '  LAPLACE_CDF evaluates the Laplace CDF;\n' );
  fprintf ( 1, '  LAPLACE_CDF_INV inverts the Laplace CDF.\n' );
  fprintf ( 1, '  LAPLACE_PDF evaluates the Laplace PDF;\n' );

  a = 1.0;
  b = 2.0;

  check = laplace_check ( a, b );

  if ( ~check );
    fprintf ( 1, '\n' );
    fprintf ( 1, 'LAPLACE_CDF_TEST - Fatal error!\n' );
    fprintf ( 1, '  The parameters are not legal.\n' );
    return
  end

  fprintf ( 1, '\n' );
  fprintf ( 1, '  PDF parameter A =             %14g\n', a );
  fprintf ( 1, '  PDF parameter B =             %14g\n', b );

  seed = 123456789;

  fprintf ( 1, '\n' );
  fprintf ( 1, '       X            PDF           CDF            CDF_INV\n' );
  fprintf ( 1, '\n' );

  for i = 1 : 10

    [ x, seed ] = laplace_sample ( a, b, seed );

    pdf = laplace_pdf ( x, a, b );

    cdf = laplace_cdf ( x, a, b );

    x2 = laplace_cdf_inv ( cdf, a, b );

    fprintf ( 1, ' %14g  %14g  %14g  %14g\n', x, pdf, cdf, x2 );

  end

  return
end
