有如下程序： #include＜iostream＞ using namespac
题型：单项选择题
问题：
有如下程序： #include＜iostream＞ using namespace std； class Base { public:void funl(){cout＜＜"Basea"；}virtual void fun2(){tout＜＜"Base\n"；} }； class Derived：public Base {public: void funl() {cout＜＜"Derived\n"; } void fun2() {cout＜＜"Derived\n"; } }; void f(Base& b) {b.funl(); b.fun2(); } int main() {Derived obj;f(obj);return 0; } 执行这个程序的输出结果是
A．Base Base
B．Base Derived
C．Derived Base
D．Derived Derived
Aα1，Aα2，…，Aαn线性无关．