c++面试题

 // cpp.cpp : 定义控制台应用程序的入口点。//#include "stdafx.h"#include<iostream>using namespace std;class A {public:    A() {     }    virtual  void f() {        cout << "A::f()\n";    }    void f()const {        cout << "A::f() const\n";    }};A::A(){}class B:public A{public:    void f() {        cout << "B::f()\n";    }    void f() const {        cout << "B::f() const\n";    }};void g(const A* a) {    a->f();};int main(int argc,char *argv[]){    A *   p = new B();     p->f();    g(p);    delete(p);    system("pause");    return 0;}

最后输出:B::f()
A::f() const