How to access to methods of parent class

[tonnot]

I dont know if what I want have to be done using inheritance or simply writing correct 'friend' keyword.

I have the next code :

ClassA  
    public :    
      void methodA
    private :     
      ClassB my_classb

ClassA  
    public :    
      void methodA
    private :     
      ClassB my_classb

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ClassB
      void methodB

ClassB
      void methodB

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void ClassB::methodB
{
   if (condition)
   classB.methodA ();
}

void ClassB::methodB
{
   if (condition)
   classB.methodA ();
}

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As you can see I'd want to acces to a methodA from metodB.
I can do the work using inheritance, but I would not want access to all public members, only to one of them.
I have see also the friend keyword, but I dont know how to write the correct code.

I'm sure that this is easy to do, but I dont find the way.
Any help will be appreciated.