关于虚函数的问题，挺简单的。
#include<iostream>
using namespace std;
class Base
{
public:
virtual ~Base( )
{cout<<"~Base"<<endl;}
};
class Derived : public Base
{
public:
virtual ~Derived( )
{cout<<"~Derived"<<endl;}
};
int main(void)
{
Base *pb = new Derived;
delete pb;
return 0;
}

结果为:
~Derived
~Base

[解决办法]
楼上说全了，没分赚了，顶一下，走人。。。。