// Ex8_01.cpp
  // Class with an explicit destructor
  include <iostream>
  using std::cout;
  using std::endl;
  
  class CBox                     // Class definition at global scope
  {
    public:
      // Destructor definition
      ~CBox()
      {
        cout << "Destructor called." << endl;
      }
  
      // Constructor definition
      CBox(double lv = 1.0, double wv = 1.0, double hv = 1.0):
                                    m_Length(lv), m_Width(wv), m_Height(hv)
      {
        cout << endl << "Constructor called.";
      }
  
      // Function to calculate the volume of a box
      double Volume() const
      {
        return m_Length*m_Width*m_Height;
      }
  
      // Function to compare two boxes which returns true
      // if the first is greater that the second, and false otherwise
      int compare(CBox* pBox) const
      {
        return this->Volume()  >  pBox->Volume();
      }
  
    private:
      double m_Length;         // Length of a box in inches
      double m_Width;          // Width of a box in inches
      double m_Height;         // Height of a box in inches
  };
  
  // Function to demonstrate the CBox class destructor in action
  int main()
  {
    CBox boxes[5];              // Array of CBox objects declared
    CBox cigar(8.0, 5.0, 1.0);  // Declare cigar box
    CBox match(2.2, 1.1, 0.5);  // Declare match box
    CBox* pB1 = &cigar;         // Initialize pointer to cigar object address
    CBox* pB2 = 0;              // Pointer to CBox initialized to null
  
    cout << endl 
         << "Volume of cigar is "
         << pB1->Volume();      // Volume of obj. pointed to
  
    pB2 = boxes;                // Set to address of array
    boxes[2] = match;           // Set 3rd element to match
    cout << endl                
         << "Volume of boxes[2] is "
         << (pB2 + 2)->Volume();  // Now access thru pointer
  
    cout << endl;
    return 0;
  }