#include <iostream>
using namespace std;

class base1 {
public:
    virtual void cast(){cout << " In class base1\n";}
};

class base2 {
public:
    virtual void cast() {cout << " In class base2\n";}
};

class derived: public base1, public base2 {
public:
    void cast(){cout << "In derived class \n";}
};


int main()
{

    base1* b1 = new base1;
    base2* b2 = new base2;
    derived* d = new derived;

    b1-> cast(); b2 -> cast(); d -> cast();
    b2= dynamic_cast< base2*>(b1);  
    if (b2)  
       b2 -> cast();  
    else 
       cout << "no cast\n";
   
    b2 = dynamic_cast< base2*>(d);  //succeeds
    if (b2)
       b2 -> cast();  
    else 
       cout << "no cast\n";
    return 0;
}