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(inti):Base(i)
B.Derived()
C.Void Derived (inti):Base(i)
D.Denved(inti)Base(i);