>>659
class Base
{
public:
　virtual void foo() const { cout << "Base::foo()\n"; }
};
class Derived : private Base
{
public:
　void foo() const { cout << "Derived::foo()\n"; }
　static void test()
　{
　　const auto_ptr<Base> test(new Derived);
　　test->foo();
　}
};