class T1
{
public:
T1();
~T1();
virtual void free();
};
T1::T1()
{
puts("T1::T1");
};
T1::~T1()
{
puts("T1::~T1");
free();
};
void T1::free()
{
puts("T1::free");
};
class T2 : public T1
{
public:
T2();
~T2();
virtual void free();
};
T2::T2()
{
puts("T2::T2");
};
T2::~T2()
{
puts("T2::~T2");
free();
};
void T2::free()
{
puts("T2::free");
};
int _tmain(int argc, _TCHAR* argv[])
{
/*
T2 * pt2;
T1 * pt1;
pt2=new T2();
pt1 = pt2;
//pt1->free();
delete pt1;
*/
T1 * pt1;
pt1=new T2();
pt1->free();
delete pt1;
getchar();
return 0;
}
-----------------------------------------------------
输出结果：
T1::T1
T2::T2
T2::free
T1::~T1
T1::free |
