#include <iostream>

using namespace std;

class A{
public :
	int foo;

	A(){
		cout<<"A ctor called"<<endl;	
	}
	
	~A(){
		cout<<"A dtor called"<<endl;	
	}
	
	void f(){
		cout<<"f called"<<endl;
	}	
};

class B : public A{
public :
	B(){
		cout<<"B ctor called"<<endl;	
	}
	
	~B(){
		cout<<"B dtor called"<<endl;	
	}
};

int main(){
	B *c;
	c->f();
	c->foo=12;
}

/* OUTPUT :-
rahul@kodersbox:~/Desktop/krew$ g++ boo.cpp
rahul@kodersbox:~/Desktop/krew$ ./a.out
f called
Segmentation fault
*/