继承下的名字查找规则，最近作用域

1，

#include <iostream>
using namespace std;

class A
{
public:
    virtual ~A() {}
    virtual void f()
    {
        cout << "A::f\n";
    }
};

class B : virtual public A
{
public:
    void f()
    {
        cout << "B::f\n";
    }
};

class C : public B, virtual public A {};

int main()
{
    A* p = new C;
    p->f(); // Calls B::f()
    //注：由于B是A的子类，因此按照名字作用域查找规则，B的优先级高于A
    delete p;
}