ex7_10.cpp

Visual C++ 2005的源代码

// Ex7_10.cpp
// Using the pointer this
#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;
    }

    // Function to compare two boxes which returns true (1)
    // if the first is greater than the second, and false (0) otherwise
    int Compare(CBox xBox)
    {
      return this->Volume() > xBox.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

};

int main()
{
  CBox match(2.2, 1.1, 0.5);           // Declare match box
  CBox cigar(8.0, 5.0,1.0);            // Declare cigar box

  if(cigar.Compare(match))
    cout << endl
         << "match is smaller than cigar";
  else
    cout << endl
         << "match is equal to or larger than cigar";

  cout << endl;
  return 0;
}