// Box.h in Ex9_02
  #pragma once
  
  class CBox
  {
    public:
      CBox(double lv = 1.0, double wv = 1.0, double hv = 1.0):
                               m_Length(lv), m_Width(wv), m_Height(hv){}
  
      //Function to calculate the volume of a CBox object
      double Volume() const
      { return m_Length*m_Width*m_Height; }
  
    private:
      double m_Length;
      double m_Width;
      double m_Height;
  };