// Ex7_09.cpp
  // Initializing an object with an object of the same class
  include <iostream>
  using std::cout;
  using std::endl;
  
  class CBox                             // Class definition at global scope
  {
    public:
  
      // Constructor definition
      CBox(double lv = 1.0, double bv = 1.0, double hv = 1.0)
      {
        cout << endl << "Constructor called.";
        m_Length = lv;                   // Set values of
        m_Width = bv;                    // data members
        m_Height = hv;
      }
  
      // Function to calculate the volume of a box
      double Volume()
      {
        return m_Length*m_Width*m_Height;
      }
  
    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
  };
  
  int main()
  {
     CBox box1(78.0, 24.0, 18.0);
     CBox box2 = box1;                   // Initialize box2 with box1
  
     cout << endl
          << "box1 volume = " << box1.Volume()
          << endl
          << "box2 volume = " << box2.Volume();
  
     cout << endl;
     return 0;
  }