// Ex7_05.cpp
// Supplying and using a default constructor
#include <iostream>
using std::cout;
using std::endl;
class CBox                                  // Class definition at global scope
{
public:
  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

  // Constructor definition
  CBox(double lv, double wv, double hv)
  {
    cout << "Constructor called." << endl;
    m_Length = lv;                          // Set values of
    m_Width = wv;                           // data members
    m_Height = hv;
  }

  // Default constructor definition
  CBox()
  {
    cout << "Default constructor called." << endl;
  }

  // Function to calculate the volume of a box
  double Volume()
  {
    return m_Length* m_Width* m_Height;
  }
};

int main()
{
  CBox box1( 2.0, 3.0, 4.0 );            // Define and initialize box1
  CBox box2;                                // Define box2 - no initial values
  CBox cigarBox( 8.0, 5.0, 1.0 );           // Define and initialize cigarBox

  cout << "Volume of box1 = " << box1.Volume() << endl;
  cout << "Volume of cigarBox = " << cigarBox.Volume() << endl;

  box2.m_Length = box1.m_Length - 1.5;      
  box2.m_Height = box1.m_Height / 2.0;     
  box2.m_Width = 0.25*box1.m_Width;        
  cout << "Volume of box2 = " << box2.Volume() << endl;
  return 0;
}