请将下列类定义补充完整 class Base{public: void fun(
题型：填空题
问题：
请将下列类定义补充完整 class Base{public: void fun(){cout＜＜"Base::fun"＜＜end1;}}; class Derived:public Base { public: void fun(){ ______//显式调用基类的fun函数 cout＜＜"Derived::fun"＜＜end1; }};
请将下列类定义补充完整 class Base{public: void fun(){cout＜＜"Base::fun"＜＜end1;}}; class Derived:public Base { public: void fun(){ ______//显式调用基类的fun函数 cout＜＜"Derived::fun"＜＜end1; }};