#include "oo/PiFunction.h"

namespace functions
{
  namespace oo
  {
    /** 
     * Default constructor
     */
    PiFunction::PiFunction ()
    {
    }
    /**
     * A simple linear function.
     */
    double PiFunction::evaluate (double x)
    {
      return 4.0 / (1.0 + x * x);
    }
  }
}