修改基类中

Question

我有以下代码，在派生类的虚拟功能的虚拟功能，如何可以调用相同的功能在基类来修改基类？

class Base{ 
public: 
    int a; 
    virtual Base & operator +=(Base const & rhs) 
    { 
    a += rhs.a; 
    return *this; 
    } 
}; 

class Derived: public Base{ 
public: 
    int b; 
    virtual Derived & operator +=(Derived const & rhs) 
    { 
    // What should I write to invoke the += in Base class? 
    // something like Base::+=(rhs.Base); 
    b += rhs.b; 
    return *this; 
    } 
}; 

Answer 1

您可以添加：

Base::operator+=(rhs); 

调用基础版本。