Question

I am writing a simple piece of code.

class A
 {
   public:
   virtual func ()
    { // allocate memory 
    }
 };

class B : public A
 {
   public:
   func ()
    { // some piece of code
      // but call base class same function Ist 
    }
 }

 main()
    {
      A *ptr = new B;
      ptr->func () //here I want to call base class function first 
                   //and then derived class function
                   // How to implement ??
    }

1. How to call base class function first and then call same function from derived class ??.
   I dont want to call each function explicetly, I will just call derived class function and the base class function should be automatically called.

2. I dont want any constructor to call these functions.

3. Is there any way to implement this or this is all rubbish.

Answer 1

Call the method func of the parent class (you need to do this explicitly) in the implementation of B:

class B: public A
{
    public:
    func()
    {
        A::func();
        ...
    }
}