类Base及其派生类Derived的定义如下：则下列说法正确的是（）

class Base{

protected:

void fun（）{}

};

Class Derived: Base{};

则Base 类中的成员函数fun（），在Derived 类中的访问权限是 [12] （注意：要求填写private、protected 或public 中的一项）。

有如下程序，请问其输出是____。 class Base { //基类 public: Base() { cout << "1" ; } ~Base() { } }; class Derived : public Base { //派生类 public: Derived() { Base(); cout << "3"; } ~Derived() { } }; int main(int argc, char* argv[]) { Derived od; return 0; }

A．d=b

B．b=d

C．Derived*d=&b

D．Base&b=d

A、Base object = new Derived();

B、Base object = new Base();

C、Derived object = new Derived();

D、Derived object = new Base();

假设有如下程序，该程序输出为____ class Base { //基类 int x, y; public: Base(int a, int b) { x=a; y=b; } ~ Base(){ cout<<"destruct base } }; derived: public { 派生类 public: derived(int z):base(z,z) ~ derived() derived int main(int argc, char* argv[]) od(8); return 0;> A、destruct Base

B、destruct Base destruct Derived

C、destruct Derived destruct Base

D、destruct Derived

A、Hello in Base!

B、Hello in Derived!

C、Hello in Base!Hello in Derived!

D、Hello in Derived!Hello in Base!.

请将下列类定义补充完整。

class Base{public:void fun(){cout＜＜"Base::fun"＜＜endl;}};

class Derived:public Base

{

public:

void fun(){

______//显式调用基类的fun函数

cout＜＜"Derived::fun"＜＜endl;

}

};

请将下列类定义补充完整。

class Base{public：void fun(){tout＜＜"Base：：fun"＜＜endl;}}；

class Derived：public Base

{

public：

void fun()

{

______//显示调用基类的fun函数

cout＜＜"Derived：：fun"＜＜endl；

}；

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;

}

};