虚函数的继承问题

keneth2078

比如
class base
{
public:
     virtual aa() { printf(...);}
};

class derived : public base
{

};


请问derived中有虚函数aa()吗？

hellioncu

当然有

koala114

absolutely yes。
If the derived class provides a new definition of a virtual
function, the vtbl holds the address of the new function.
If the derived class doesn’t redefine
the virtual function, the vtbl holds the address of the original version of the function.