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有如下程序:includeusing namespace std;class XX{protected:int k;public:XX(int n=
有如下程序: #include<iostream> using namespace std; class XX { protected: int k; public: XX(int n=5):k(n){}; ~XX() { cout<<"XX": } virtual void f()const=0; }; inline void XX::f()const { cout<<k+3; }; class YY:public XX { public: ~YY() { cout<<”YY”; } void f()const { cout<<k-3; XX::f(); } }; int main() { XX &p=*new YY; P.f(); delete &p; return 0: } 执行上面的程序将输出( )。
A.28XX
B.28YYXX
C.33XX
D.33XXYY
参考答案
更多 “ 有如下程序:includeusing namespace std;class XX{protected:int k;public:XX(int n= 有如下程序: #include<iostream> using namespace std; class XX { protected: int k; public: XX(int n=5):k(n){}; ~XX() { cout<<"XX": } virtual void f()const=0; }; inline void XX::f()const { cout<<k+3; }; class YY:public XX { public: ~YY() { cout<<”YY”; } void f()const { cout<<k-3; XX::f(); } }; int main() { XX p=*new YY; P.f(); delete p; return 0: } 执行上面的程序将输出( )。A.28XXB.28YYXXC.33XXD.33XXYY ” 相关考题
考题
有以下程序:include using namespace std; class Base { public: Base() { K=0; } int
有以下程序:include<iostream>using namespace std;class Base{public:Base(){K=0;}int x;};class Derivedl:virtual public Base{public:Derivedl(){x=10;}};class Derived2:virtua1 public Base
考题
有如下程序:includeusing namespace std;class XX{protected;int k;public:XX(int n=
有如下程序: #include<iostream> using namespace std; class XX{ protected; int k; public: XX(int n=5):k(n){} ~XX(){cout<<"XX";} Virtual void f()cons=0; }; inline void XX::f()const{cout<<k+3;} class YY:public XX{ public:A.28XXB.28YYXXC.-33XXD.-33XXYY
考题
下列程序的执行结果是______。 include class Student { public: Student(int xx){x=
下列程序的执行结果是______。include<iostream.h>class Student{public:Student(int xx){x=xx;}virtual float calcTuition( );protected:int x;};float Studertt::calcTuition( ){return float(x*x);}class GraduateStudent:public Student{public:GraduateStudent(int xx):Student(xx){}float calcTuition( );};float Graduatestudent::calcTuition( ){return float(x*2);}void main( ){Student s(20);GraduateStudent gs(30);cout<<s.calcTuition( )<<" "<<gs.calcTuition( )<<endl;//计算学生s和研究生gs的学费}
考题
有如下程序:include using namespace std;Class x{protected: int a;public: x() {a=
有如下程序: #include <iostream> using namespace std; Class x { protected: int a; public: x() { a=1; } }; class x1 : virtual public x { public: x1() { a+=1; cout<<A.1B.123C.242D.244
考题
有如下程序:include using namespace std;class Base{protected:int i;public:int
有如下程序: #include <iostream.h> using namespace std; class Base { protected: int i; public: int j; }; class Derived:public Base { int m; public: int n; }; int main() { Derived d; d.i=0; //[1] d.j=0; //[2] d.m=0; //[3] d.n=0; //[4] return 0; } 其中主函数中有两个赋值语句有错,这两个错误的赋值语句是( )。A.[1]和 [2]B.[1]和[3]C.[2]和[3]D.[2]和[4]
考题
有如下程序:includeusingnamespacestd;classXX{protected: intk;public: XX(intn=5):
有如下程序: #include <iostream> using namespace std; class XX { protected: int k; public: XX(int n=5):k(n){} ~XX() { cout<<"XX"; } virtual void f() const=0; }; inline void XX::f()A.28XXB.28YYXXC.-33XXD.-33XXYY
考题
有如下程序:include using namespace std;class x{protected: int a;public: x() { a
有如下程序: #include <iostream> using namespace std; class x { protected: int a; public: x() { a=1; } }; class x1 : virtual public x { public: x1() { a+=1; cout<<a; } };A.1B.123C.242D.244
考题
有如下程序:include using namespace std;class Base{ protected: int i;public: int
有如下程序: #include <iostream> using namespace std; class Base { protected: int i; public: int j; }; class Derived:public Base {int m; public: int n; }; int main() { Derived d; d.i=0;//[1]d.j=0;//[2]d.m=0;//[3]d.n=0;//[4]return 0; } 其中主函数中有两个赋值语句有错,这两个错误的赋值语句是______ 。A.[1]和[2]B.[1]和[3]C.[2]和[3]D.[2]和[4)
考题
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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