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
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
相关考题：
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有如下程序:include using namespace std;class BASE{public:~BASE(){cout 有如下程序： #include ＜iostream＞ using namespace std; class BASE{ public: ～BASE(){cout＜＜"BASE";} }; class DERIVED:public BASE{ public: ～DERIVED(){cout＜＜"DERIVED";} }; int main(){DERIVED x;return 0;} 执行后的输出结果是A．BASEB．DERIVEDC．BASEDERIVEDD．DERIVEDBASE
有如下程序:includeusing namespace std;class BASE{public:~BASE( ){cout 有如下程序： #include＜iostream＞ using namespace std； class BASE{ public： ～BASE( ){cout＜＜"BASE"；} }； class DERIVED：public BASE{ public： ～DERIVED( ){cout＜＜"DERIVED"；} }； int main( ){DERIVED x；return 0；} 程序的输出结果是A．BASEB．DERIVEDC．BASEDERIVEDD．DERIVEDBASE
下列程序的运行结果是______。include class Base { public: void f(int x){cout 下列程序的运行结果是______。include＜iostream.h＞class Base{public：void f(int x){cout＜＜“Base：”＜＜x＜＜endl；})；class Derived：public Base{public：void f(char*str){cout＜＜“Derived：”＜＜str＜＜endl；}}；void main(void){Base*pd＝ne
有如下程序:includeincludeusing namespace std;class BASE{char c;public 有如下程序： #include＜iostream＞#include＜iosream＞ using namespace std； class BASE{ char c； public； BASE(char n)：c(n){} virtual ～ BASE(){cout＜＜c;} }； class DERIVED; public BASE{ char c； public： DERIVED (char n): BASE (n+1)A．XYB．YXC．XD．Y
有如下程序： #includeiostream using namespace std； class Base { public： void funl{cout”Base＼n”；} virtual void fun2{eout”Base＼n”；} }； class Derived：public Base{ public： void funl{eout”Derived、n”；} void fura{eout．”Derived＼n”；} }； void f(BaseB．}b．funl；b．ftm2；} int 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
有如下程序:include using namespace std;class BASE{public:~BASE() {cout 有如下程序: #include ＜iostream＞ using namespace std; class BASE{ public: ～BASE() {cout＜＜"BASE"; } }; class DERIVED: public BASE { public: ～DERIVED() {cout＜；"DERIVED"; } }; int main(){DERIVED x; return 0;} 执行后的输出结果是______ 。A．BASEB．DERIVEDC．BASEDERIVEDD．DERIVEDBASE
有以下程序:include using namespace std;class Base{public:Base(){}virtual void w 有以下程序： #include ＜iostream＞ using namespace std; class Base { public: Base(){} virtual void who() { cout＜＜"Base Class"＜＜end1; } ～Base(){} }; class Derivel : public Base { public: void who() { cout＜＜"Derivel Class"＜＜end1; } }; class Derive2 : public Base { public: void who () { cout＜＜"Derive2 Class"＜＜end1; } }; int main () { Base *p; Derivel obj1; Derive2 obj2; p=obj1; p=obj2; p-＞who ( ); return 0; } 执行程序后的输出结果是( )。A．Base ClassB．Derivel ClassC．Derive2 ClassD．程序编译时出错
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;}