function f = p12_f ( x )

%*****************************************************************************80
%
%% p12_f() evaluates the objective function for problem 12.
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    02 August 2019
%
%  Author:
%
%    John Burkardt
%
%  Input:
%
%    real x, the argument of the objective function.
%
%  Output:
%
%    real f, the value of the objective function.
%
  f = x .* x + sin ( 53.0 * x );

  return
end
