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)
Derived(inti)Base(i);
若有以下程序: #include<iostream> usingnamespacestd; classA private: int x; public: int x; void setx(int i) x=i; int getx() return x; ; class B:public A private: int m; public: int p; void setvalue (int a,int b,int C) setx(
A. ;
B. z=b;
C. m=c;
D. void display()
E. cout<<getx()<<","<<z<<","<<m<<end1;
F. ;
G. int main()
H. B obj;
I. obj.setvalue(2,3,4);
J. obj.display();
K. return 0;
L. 程序运行以后的输出结果是A) 产生语法错误
M. 2,3,4
N. 2,2,2
O. 4,3,2