geeksforgeeks-060-赋值操作符可以被继承吗？

#include<iostream>
 
using namespace std;
 
class A {
 public:
   A & operator= (A &a) {
    cout<<" base class assignment operator called ";
    return *this;
   }
};
 
class B: public A { };
 
int ()
{
  B a, b;
  a.A::operator=(b); 
                    // using derived class
  getchar();
  return 0;
}