17-5.txt

《C/C++完美演绎》源代码

/* 范例：17-5 */
#include <iostream.h>
class A
{
  public:
    A(){cout << this << " A Constructor\n";}
    ~A(){cout << this << " A Destructor\n";}
};

class B:public A
{
  public:
    B(){cout << this << " B Constructor\n";}
    ~B(){cout << this << " B Destructor\n";}
};

void test()
{
  B obj1,obj2; 	// 创建对象 obj1,obj2
  cout << &obj1 << " " << &obj2 << "\n";
}	// 离开函数删除对象 obj1,obj2

void main()
{
  test();
  getchar();
}

程序执行结果：(方框为先建的obj1地址，未框者为obj2的地址)
0065FDF4 A Constructor
0065FDF4 B Constructor
0065FDEC A Constructor
0065FDEC B Constructor
0065FDF4 0065FDEC
0065FDEC B Destructor
0065FDEC A Destructor
0065FDF4 B Destructor
0065FDF4 A Destructor