有如下程序: include class x { protected: int a; public:x(){ a=1;} }; class x 有如下程序： #include ＜iostream.h＞ class x { protected: int a; public: x() { a=1; } }; class x1 : virtual public x { public: x1() { a+=1; cout＜＜a; } }; class x2 : virtual public x { public: x2() { a+=2; cout＜＜a; } }; class y : public xl,public x2 { public: y() { cout＜＜a＜＜end1; } }; int main() { y obj; return O; } 该程序运行后的输出结果是( )。A．1B．123C．242D．244
有如下程序: include class x { protected: int a; public:x(){ a=1;} }; class x
有如下程序： #include ＜iostream.h＞ class x { protected: int a; public: x() { a=1; } }; class x1 : virtual public x { public: x1() { a+=1; cout＜＜a; } }; class x2 : virtual public x { public: x2() { a+=2; cout＜＜a; } }; class y : public xl,public x2 { public: y() { cout＜＜a＜＜end1; } }; int main() { y obj; return O; } 该程序运行后的输出结果是( )。
A．1
B．123
C．242
D．244
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有以下程序: include class A { intx; public: A(int a) { x=a;} friend class B; 有以下程序：include＜iostream.h＞class A{int x;public:A(int a){x=a;}friend class B;}class B{public:void print(A a){a. x--;cout＜＜a.x＜＜end1;}};void main(){A a(10);B b;b.print(a) ;}程序执行后的输出结果是【 】。
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
请找出下列程序中错误之处 ______。 include classA{private: intx1;protected: int 请找出下列程序中错误之处 ______。#include＜iostream.h＞class A{private：int x1；protected：int x2；public：int x3；};class B：public A{private：int y1；protected：int y2；public：int y3；void disp(){cout＜＜x1＜＜y1＜＜end1：} //Avoid set(int i) {x2=i；} //B}；void main() {B bb；bb.x3=10； //Cbb.y3=10； //D}A．AB．BC．CD．D
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
阅读以下说明和Java程序，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Java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。部分接口、类及其关系如图5－1所示。【Java代码】interface?DrawCircle?{? //绘制圆形 public（1） ；}class?RedCircle?implements?DrawCircle?{? ?//绘制红色圆形???????public?void?drawCircle(int?radius,intx,?int?y)??{????????????System.out.println("Drawing?Circle[red,radius:"?+?radius?+",x:"?+?x?+?",y:"?+y+?"]");???????}}class?GreenCircle?implements?DrawCircle?{????//绘制绿色圆形??????public?void?drawCircle(int?radius,?int?x,int?y)?{???????????System.out.println("Drawing?Circle[green,radius:"?+radius+",x:?"?+x+?",y:?"?+y+?"]");??????}}abstract?class?Shape?{????//形状? protected? ? （2）???;? ? public?Shape(DrawCircle?drawCircle)?{? ?this.drawCircle=?drawCircle;? ? ? public?abstract?void?draw();}class?Circle?extends?Shape?{? //圆形? ?private?int?x,y,radius;? public?Circle(int?x,int?y,intradius,DrawCircle?drawCircle)?{? ?（3）???;? this.x?=?x;? ? ? this.y?=?y;? ?this.radius?=radius;? }? ? ?public?void?draw()?{? ? drawCircle.? ?（4）? ?;? ? ? }}public?class?DrawCircleMain?{? public?static?void?main(String[]?args)?{? Shape?redCircle＝new?Circle(?100,100,10,? （5） )；//绘制红色圆形? Shape?greenCircle＝new?Circle(200,200,10,（6） )；//绘制绿色圆形? ?redCircle.draw(); greenCircle.draw();? ?}}
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;}
1、下面代码的输出结果是（） x = 12.34 print（type（x))A．＜class ‘int’＞B．＜class ‘float’＞C．＜class ‘bool’＞D．＜class ‘complex’＞
00330038003000301585067361821下列程序段执行结果是___________。 x = 1 print（type（x)) x = 1.0 print（type（x)) x = '1.0' print（type（x)A．＜class 'int'＞ ＜class 'float'＞ ＜class 'str'＞B．＜class 'float'＞ ＜class 'int'＞ ＜class 'str'＞C．＜class 'str'＞ ＜class 'float'＞ ＜class 'int'＞D．＜class 'str'＞ ＜class 'int'＞ ＜class 'float'＞
下列程序段执行结果是___________。 x = 1 print（type（x)) x = 1.0 print（type（x)) x = '1.0' print（type（x)A．＜class 'int'＞ ＜class 'float'＞ ＜class 'str'＞B．＜class 'float'＞ ＜class 'int'＞ ＜class 'str'＞C．＜class 'str'＞ ＜class 'float'＞ ＜class 'int'＞D．＜class 'str'＞ ＜class 'int'＞ ＜class 'float'＞