Method volume

Examples/NoModules/Chapter 15/Ex15_10/Carton.h:17–21

Function to calculate the volume of a Carton object

  // Function to calculate the volume of a Carton object
  double volume() const override
  {
    const double volume {(m_length - 0.5) * (m_width - 0.5) * (m_height - 0.5)};
    return std::max(volume, 0.0);     // Or: return volume > 0.0 ? volume : 0.0; 
  }
private:
  std::string m_material;
};