有如下程序: #includeiostream using namespace std; class GA{ public: virtual int ft retum l;} }; class GB:public GA{ public: virtual int f{retum 2;} }; void show(GA g){eout9.f;} void display(GAg){cout9.f;} int main { GA a;show(A.;display(A.; GB b;show(B.;display(B.; return 0; } 执行这个程序的输出结果是( )。A.1111B.1211C.1112D.1212
有如下程序: #include<iostream> using namespace std; class GA{ public: virtual int ft retum l;} }; class GB:public GA{ public: virtual int f{retum 2;} }; void show(GA g){eout<<9.f;} void display(GA&g){cout<<9.f;} int main { GA a;show(A.;display(A.; GB b;show(B.;display(B.; return 0; } 执行这个程序的输出结果是( )。
A.1111
B.1211
C.1112
D.1212
相关考题:
若类A和类B的定义如下:includeclass A{int i,j;public:int geti(){return i;}};class 若类A和类B的定义如下: #include<malloc.h> class A { int i,j; public: int geti() { return i; } }; class B:public A { int k; public: void make() { k=i*j; } }; 则上述定义中非法的表达式是( )。A.k=i*jB.int k;C.return i;D.void make();
有如下程序:includeusing namespace std;class GA{public:virtual int f( ){return 1 有如下程序: #include<iostream> using namespace std; class GA{ public: virtual int f( ){return 1;} }; class GB:public GA{ public: virtual int f( ){return 2;} }; void show(GA g){eout<<g.f( );} void display(GA&g){cout<<g.f( );} int main( ){ GA a;show(A) ;display(A) ; GB b;show(B) ;display(B) ; return 0; } 程序的输出结果是A.1111B.1211C.1112D.1212
若类A和类B的定义如下:includeclass A{int i*j;public:int geti(){return i;}};class 若类A和类B的定义如下: #include<malloc.h> class A { int i*j; public: int geti() { return i; } }; class B: public A { int k; public: void make() { k=i*j; } ); 则上述定义中非法的表达式是( )。A.k=i*j;B.int k;C.return i;D.void make();
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
请将如下程序补充完整,使得输出结果为:bbaa。 include using naluespace std; class 请将如下程序补充完整,使得输出结果为:bbaa。include<iostream>using naluespace std;class A{public:______{eout<<"aa";}};class B:public A{public:~B( ){eont<<"bb";}};int ulain( ){B*P=new B;delete P;return 0;}
有以下程序:includeusing namespace std;class BASE{private: char c;public: BASE(c 有以下程序: #include <iostream> using namespace std; class BASE { private: char c; public: BASE(char n):c(n);{} virtual~BASE() { cout<<c; } }; class DERIVED:public BASE { char c; pA.XYB.YXC.XD.Y
下面程序输出的结果是【 】。 include using namespace std; class A { public:virtual 下面程序输出的结果是【 】。include <iostream>using namespace std;class A {public:virtual void show() {cout<<"A!";};class B: public A {public:void show() {cout << "B!";}};class C: public B{public:void show(){cout << "C!";}};void show_info(A i) {i. show();}void main() {A ia; B ib; C ic; show_info(ia);show_info(ib); show_info(ic); }
有如下程序:includeusing namespace std;Class TestClass{int a;public:TestClass(in 有如下程序: #include<iostream> using namespace std; Class TestClass {int a; public: TestClass(int x){a=x;} void show(){cout<<a;}}; class TestClass1:public TestClass {int b; public: TestClass1(int i):TestClass(i+1),b(i){} voiA.5B.1C.0D.2
下面程序的运行结果是()。includeusing namespace std;class A{public: virtual~A() { 下面程序的运行结果是( )。 #include<iostream> using namespace std; class A { public: virtual~A() { cout<<"call A::~A()"<<endl;} }; class B:public A { char * p; public: B(int i) { p=new char[i];} ~B() { delete(p); cout<<"call B::~B()"; } }; void main() { A * a=new B(8); delete a; }A.call B::~B()call A::~A()B.call B::~B()C.call A::~A()D.call A::~A()call B::~B()
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;}