class A
{
  public:
    A ():m_iVal(0){test();}
    virtual void func() { std::cout<<m_iVal<<‘ ’;}
    void test(){func();}
  public:
      int m_iVal;
};
class B : public A
{
  public:
    B(){test();}
    virtual void func()
    {
      ++m_iVal;
      std::cout<<m_iVal<<‘ ’;
      }
};
int main(int argc ,char* argv[])
{
  A*p = new B;
  p->test();
  return 0;
}