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有如下程序：
#include
using namespace std;
class Base
{
public:
void funl(){cout<<"Base\n";}
virtual void fun2(){cout<<"Base\n";}
};
class Derived:public Base
{
public:
void funl(){cout<<"Derived\n";}
void fun2(){cout<<"Derived\n";}
};
void f(Base &
B ． {b.funl();b.fun2();}&, lt;, /P>
int main()
{
Derived obj;
f(obj);
return 0;
}
执行这个程序的输出结果是
A ． Base Base
B ． Base Derived
C ． Derived Base
D ． Derived Derived
参考答案
更多 “ 有如下程序：#includeusing namespace std;class Base{public:void funl(){cout"Base\n";}virtual void fun2(){cout"Base\n";}};class Derived:public Base{public:void funl(){cout"Derived\n";}void fun2(){cout"Derived\n";}};void f(Base B ． {b.funl();b.fun2();}, lt;, /Pint main(){Derived obj;f(obj);return 0;}执行这个程序的输出结果是A ． Base BaseB ． Base DerivedC ． Derived BaseD ． Derived Derived ” 相关考题
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阅读下列说明和C++代码，填写程序中的空（1）～（6），将解答写入答题纸的对应栏内。
【说明】
以下C++代码实现一个简单绘图工具，绘制不同形状以及不同颜色的图形。部分类及其关系如图6－1所示。
【C++代码】
#include?#include?using?namespace?std;class?DrawCircle?{??????//绘制圆形，抽象类? ? ? public: （1）；//定义参数为?int?radius,?int?x,?inty? ?virtual～DrawCircle()?{?}};class?RedCircle：public?DrawCircle?{????//绘制红色圆形? ? ? ? public: void?drawCircle(intradius,?int?x,?int?y)?{cout??drawCircle?=?drawCircle;? }? ?virtual～shape()?{?}? public:? ?virtual?void?draw()?=?0;};class?Circle：public?Shape?{????//圆形? ? private:? ? ?int?x,y,radius;? ? public:? Circle(int?x,inty,int?radius,DrawCircle?*drawCircle)? （3）? {? this->x?=?x;? ?this->y?=?y;? ? this->radius?=?radius; }? ? ? public:? void?draw(){? drawCircle?-> （4）; }};int?main(){Shape?*redCirclenew?Circle(100,100,10,????（5）????);//绘制红色圆形? Shape?*greenCircle＝new?Circle(100,100,10, （6）??);//绘制绿色圆形redCircle >draw();? ?greenCircle?->draw();? ?return?0;}
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