function f = p40_f ( x )

%*****************************************************************************80
%
%% p40_f() evaluates the objective function for test 40.
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    23 February 2026
%
%  Author:
%
%    John Burkardt
%
%  Input:
%
%    real x: the argument.
%
%  Output:
%
%    real f: the function value.
%
  f = max ( ...
    2.0 - x.^2, ...
    5.0 - ( x - 4.0 ).^2 );

  return
end
