问题详情

有如下程序:#nclude ＜iostream＞using namespace std;class Base{ public:void fun1() {cout ＜＜ "Basen"; }virtual void fun2() {cout ＜＜ "Basen"; }};class Derived: public Base{ public:void fun1() {cout ＜＜ "Derivedn"; }void fun2() {cout ＜＜ "Derivedn"; }} void f(Base& b) { B. fun1(); B. fun2(); }int main(){Derived obj;f(obj);return 0;}
A．Base Base
B．Base Derived
C．Derived Base
D．Derived Derived请帮忙给出正确答案和分析，谢谢！