为完成下面的程序,应在划线处填入的语句是 #include<iostream> using namespace std; class Base { private: int x; public: Base (int i) { x=i; }~Base(){} }; class Derived:public Base { public:______________//完成类Derive构造函数的定义 }; int main() {Derived Obj;return 0; }
A.Derived(int :Base({}
B.Derived(){}
C.void Derived (int :Base({}
D.Derived(int {Base(;}