c++ - how to use the operator of parent class?

itemprop="text">

class
            A

{
protected:
 void
            f();
}

class B : public
            A
{
protected:
 void f()

            {

 A::f();

            }
}

We can
use the function of parent class in this way, but I don't know how to use the operator
of parent class.

itemprop="text">

class="normal">Answer

Operators
of user defined types are just member functions with funky names. So, it goes pretty
similarly to your
example:

#include
            


class
            A
{
protected:
 A& operator++() { std::cout <<
            "++A\n"; return *this; }
};

class B : public
            A
{
public:

 B& operator++()

            {
 A::operator++();
 return *this;

            }
};


int
            main()
{

 B b;

            ++b;
}