#include  

using std::cout; 
using std::endl; 
 
class Base 
{ 
public: 
    virtual void f(float x){ cout << "Base::f(float) " << x << endl;} 
    void g(float x){ std::cout << "Base::g(float) " << x << std::endl;} 
    void h(float x){ std::cout << "Base::h(float) " << x <
}; 
 
class Derived : public Base 
{ 
public: 
    virtual void f(float x){ std::cout << "Derived::f(float) " << x << std::endl;} 
    void g(int x){ std::cout << "Derived::g(int) " << x << std::endl;} 
    void h(float x){ std::cout << "Derived::h(float) " << x << std::endl;} 
}; 
 
void main(void) 
{ 
    Derived d; 
    Base *pb = &d; 
    Derived *pd = &d; 
 
    pb->f(3.14f);//Derived::f(float) 3.14 
    pd->f(3.14f);//Derived::f(float) 3.14 
 
    pb->g(3.14f);//Base::g(float) 3.14 
    pd->g(3.14f);//Derived::g(int) 3 
 
    pb->h(3.14f);//Base:h(float) 3.14 
    pd->h(3.14f);//Derived::h(float) 3.14 
} 
 

#include  

using std::cout; 
using std::endl; 
 
class Base 
{ 
public: 
    void CheckType(void){ cout << "This's Base Ptr" << endl;} 
}; 
 
class Derived : public Base 
{ 
public: 
    void CheckType(void){ cout << "This;s Derived Ptr" << endl;} 
}; 
 
void main(void) 
{ 
    Derived d; 
    Base *pb = &d; 
    Derived *pd = &d; 
 
    pb->CheckType();//This's Base Ptr 
    pd->CheckType();//This's Derived Ptr 
}