test.cpp

#include <iostream>

using namespace std;

class A {
public:
    A(){print();}
    virtual print(){cout << "in A"<<endl;}
};

class B: public A{
public:
    B(){print();}
    virtual print(){cout << "in B"<<endl;}
};

int main(void)
{
    B b ;
    return 0;
}

yo