ex7_06.cpp

Visual C++ 2005的源代码

// Ex7_06.cpp
// Supplying default values for constructor arguments
#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 = 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;
    }
};

int main()
{
  CBox box2;                           // Declare box2 - no initial values

  cout << endl
       << "Volume of box2 = "
       << box2.Volume();

  cout << endl;
  return 0;
}