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#include<iostream>
using namespace std;

class A
{
public:

virtual void f() = 0;
};

class B: public A
{
public:

void f()
{
// f(); //segmentation Fault
cout<<"\bB's f() called"<<endl;
f(); //recursive loop
}
};

void A:: f()
{
cout<<"\nA's f() called"<<endl;
}

int main()
{
A *ptr;
B b;

ptr = &b;
b.f();

return 0;
}

Q-> In this problem.. inside the B class f( ), if we call f( ) before "cout<<" statement it gives segmentation fault and after "cout<<" statement it gives recursive loop. Why segmentation fault is coming. Thanks in Advance :)