candybox.h

Visual C++ 2005的源代码

// CandyBox.h in Ex9_04
#pragma once
#include "Box.h"
#include <iostream>
using std::cout;
using std::endl;

class CCandyBox: public CBox
{
  public:
    char* m_Contents;

    // Derived class function to calculate volume
    double Volume() const
    { return m_Length*m_Width*m_Height; }

    // Constructor to set dimensions and contents
    // with explicit call of CBox constructor
    CCandyBox(double lv, double wv, double hv, char* str = "Candy")
                                          :CBox(lv, wv, hv)  // Constructor
    {
      cout << endl <<"CCandyBox constructor2 called";
      m_Contents = new char[ strlen(str) + 1 ];
      strcpy_s(m_Contents, strlen(m_Contents), str);
    }

    // Constructor to set contents
    // calls default CBox constructor automatically
    CCandyBox(char* str = "Candy")               // Constructor
    {
      cout << endl << "CCandyBox constructor1 called";
      m_Contents = new char[ strlen(str) + 1 ];
      strcpy_s(m_Contents, strlen(m_Contents), str);
    }

    ~CCandyBox()                                 // Destructor
    {
      cout << "CCandyBox destructor called" << endl;
      delete[] m_Contents;
    }
};