Question

i have this :

class A {
    public :
        A(int i ) : m_S(i)
        {  
            m_Pa = new Foo(*this) ;
        }
    private :
        int m_S ;
        Foo* m_Pa;
}

and derived class 

class B : public A {
    public :
        B() : A (242) 
        {
          // here i like to override the A class m_Pa member but i don't know how to do it right 
        }
}

Answer 1

your m_Pa should be protected than you can call like:

 B() : A (242), m_Pa(12) 
 {

 }

or

 B() : A (242)
 {
   m_PA = 55
 }

or you should make a public or protected function which changes m_Pa

 class A {
     public :
         A(int i ) : m_S(i)
         {  
              m_Pa = new Foo(*this) ;
         }

        void setPA(int val)
        {
             m_PA = val;
        }