下列方法定义中,方法头不正确的是()。A、public static x(double a)B、public static int x(double y)C、void x(double d)

下列方法定义中,方法头不正确的是()。

  • A、public static x(double a)
  • B、public static int x(double y)
  • C、void x(double d)

相关考题:

在下面的类定义中,横线处应填入的内容是 class Fred { public: void print(){cout<<data<<endl;} void setData(double d)(data=d;} static int count; private: double data; }; count=0; //静态数据成员的定义A.intB.static intC.int Fred::D.static int Fred::

阅读下列C++程序和程序说明,将应填入(n)处的字句写在对应栏内。【说明】Point是平面坐标系上的点类,Line是从Point派生出来的直线类。include <iostream.h>class Point{public:Point (int x, int y) ;Point (Point p) ;~Point();void set (double x, double y) ;void print();private:double X,Y;};Point::Point (int x, int y) //Point 构造函数{X=x; Y=y; }Point::Point ( (1) ) //Point 拷贝构造函数{X=p.X; Y=p.Y;}void Point::set (double x, double y){X=x; Y=y; }void Point::print(){cout<<' ('<<X<<","<<Y<<") "<<endl; }Point::~Point(){cout<<"Point 的析构函数被调用! "<<endl;class Line: public Point{public:Line (int x, int y, int k) ;Line (Line s) ;~Line();void set (double x, double y, double k)void print();private:double K;};(2)//Line 构造函数实现{ K=k;}(3)//Line 拷贝构造函数实现{K=s.K;}void Line::set (double x, double y, double k){ (4);K=k;}void Line::print(){cout<<" 直线经过点";(5);cout<<"斜率为: k="<<K<<endl;}Line: :~Line(){cout<<"Line 析构函数被调用! "<<endl;}void main(){Line 11 (1,1,2) ;11 .print();Linel2 (11) ;12.set (3,2,1) ;12.print();}

阅读以下函数说明和Java代码,将应填入(n)处的字句写在对应栏内。【说明】现要编写一个画矩形的程序,目前有两个画图程序:DP1和DP2,DP1用函数draw_a_line(x1,y1,x2,y2)画一条直线,DP2则用drawline(x1,x2,y1,y2)画一条直线。当实例画矩形时,确定使用DP1还是DP2。为了适应变化,包括“不同类型的形状”和“不同类型的画图程序”,将抽象部分与实现部分分离,使它们可以独立地变化。这里,“抽象部分”对应“形状”,“实现部分”对应“画图”,与一般的接口(抽象方法)与具体实现不同。这种应用称为Bridge(桥接)模式。图9-6显示了各个类间的关系。这样,系统始终只处理3个对象:Shape对象、Drawing对象、DP1或DP2对象。以下是 Java语言实现,能够正确编译通过。【Java代码】//DP1.java文件public class DP1{static public void draw_a line(double x1,double y1,double x2,double y2){//省略具体实现}}//DP2.java文件public class DP2{static public void drawline(double x1,double y1,double x2,double y2){//省略具体实现}}//Drawing.java文件(1) public class Drawing{abstract public void drawLine(double x1, double y1, double x2, double y2);}//V1Drawing.java文件public class V1Drawing extends Drawing{public void drawLine(double x1, double y1, double x2, double y2){DP1.draw_a_line(x1,y1,x2,y2);}}//V2Drawing.java文件public class V2Drawing extends Drawing{public void drawLine(double x1,double y1,double x2, double y2)(//画一条直线(2);}}//Shape.java文件abstract public class Shape{abstract public void draw();private (3) _dp;Shape(Drawing dp){_dp=dp;}protected void drawLine(double x1,double y1,double x2, double y2){(4);}}//Rectangle.java文件public class Rectangle extends Shape{private double_x1,_x2,_y1,_y2;public Rectangle(Drawing dp,double x1,double y1,double x2,double y2){(5);_x1=x1;_x2=x2;_y1=y1;_y2=y2;}public void draw(){//省略具体实现}}

在下面的定义语句中,画线处应填入的内容是 class Fred{ public: void print( ){cout<<data<<endl;} void setData(double D) {data=d;} static int count; private: double data; }; ______count=0;//静态数据成员的定义A.intB.static intC.int Fred::D.static int Fred::

阅读以下说明和C++代码,[说明]现要编写一个画矩形的程序,目前有两个画图程序:DP1和DP2,DP1用函数draw_a_line(x1,y1,x2,y2)画一条直线,DP2则用drawline(x1,x2,y1,y2)画一条直线。当实例化矩形时,确定使用DP1还是DP2。为了适应变化,包括“不同类型的形状”和“不同类型的画图程序”,将抽象部分与实现部分分离,使它们可以独立地变化。这里,“抽象部分”对应“形状”,“实现部分”对应“画图”,与一般的接口(抽象方法)与具体实现不同。这种应用称为Bridge(桥接)模式。图6-1显示了各个类间的关系。[图6-1]这样,系统始终只处理3个对象:Shape对象、Drawingg对象、DP1或DP2对象。以下是C++语言实现,能够正确编译通过。[C++代码]class DP1{public:static void draw_a_line(double x1,double y1,double x2,double y2){//省略具体实现}};class DP2{public:static void drawline(double x1,double x2,double y1,double y2){//省略具体实现}};class Drawing{public:(1) void drawLine(double x1,double y1,double x2,double y2)=0;};class V1Drawing:public Drawing{public:void drawLine(double x1,double y1,double x2,double y2){DP1::draw_a_line(x1,y1,x2,y2);}};class V2Drawing:public Drawing{public:void drawLine(double x1,double y1,double x2,double y2){(2)}};class Shape{privatc:(3) dp;public:Shape(Drawing*dp);virtual void draw()=0;void drawLine(double x1,double y1,double x2,double y2);};Shape::Shape(Drawing*dp){_dp=dp;}void Shape::drawLine(double x1,double y1,double x2,double y2){ //画一条直线(4);}class Rectangle:public Shape{privatc:double_x1,_y1,_x2,_y2;public:Rectangle(Drawing *dp,double x1,double y1,double x2,double y2);void draw();};Rectangle::Rectangle(Drawing*dp,double x1,double y1,double x2,double y2): (5){_x1=x1;_y1=yl;_x2=x2;_y2=y2;}void Rectangle::draw(){//省略具体实现}(1)

下列程序的执行结果为【 】。include class Point{public:Point(double i, double j) 下列程序的执行结果为【 】。include <iostream. h>class Point{public:Point(double i, double j) { x=i; y=j;}double Area() const { return 0.0;}private:double x, y;};class Rectangle: public Point{public:Rectangle(double i, double j, double k, double 1)double Area() const {return w * h;}private:double w, h;};Rectangle: :Rectangle(double i, double j, double k. double 1): Point(i,j).{w=k, h=1}void fun(Point s){cout<<s. Area()<<end1;}void main( ){Rectangle rec(3.0, 5.2, 15.0. 25.0);fun(rec)}

请将下面程序补充完整。public class PowerCalc{public static void main(String[]args){double x=5.0;System. out. println(x+"to the power 4 is"+power(x, 4));System. out. println("7. 5 to the power 5 is"+power(7.5, 5));System. out. println("7.5 to the power 0 is"+power(7.5, 0));System. out. println("10 to the power -2 is"+power(10, -2));}static double【 】 (double x, int n){if(n>1)return x * power(x, n-1);else if(n<0)return 1.0/power(x, -n);elsereturn n==0 ? 1.0:x;}}

在下面的类定义中,横线处应填入的内容是 class Fred { public: void print () { cout<<data<<end1;} void setData (double D) {data=d; static int count; private: double data; };______count=0; //静态数据成员的定义A.intB.static intC.int Fred::D.static int Fred::

在下列方法的定义中,正确的是 ( )A.public double x(){..;return false;}B.public static int x(double y){...}C.void x(doubled){...;return d}D.public static x(double a){..}

阅读以下说明和c++代码,将应填入(n)处的字句写在对应栏内。【说明】现要编写一个画矩形的程序,目前有两个画图程序:DP1和DP2,DP1用函数draw_a_line(x1, y1,x2,y2)画一条直线,DF2则用drawline(x1,x2,y1,y2)画一条直线。当实例画矩形时,确定使用DP1还是DP2。为了适应变化,包括“不同类型的形状”和“不同类型的画图程序”,将抽象部分与实现部分分离,使它们可以独立地变化。这里,“抽象部分”对应“形状”,“实现 部分”对应“画图”,与一般的接口(抽象方法)与具体实现不同。这种应用称为Bridge(桥接)模式。图9-7显示了各个类间的关系。这样,系统始终只处理3个对象:Shape对象、Drawing对象、DP1或DP2对象。以下是 C++语言实现,能够正确编译通过。【C++代码】class DP1{public:static void draw_a_line(double x1, double y1,double x2, double y2){//省略具体实现});class DP2{public:static void drawline(double x1, double x2,double y1, double y2){//省略具体实现}};class Drawing{public:(1) void drawLine(double x1,double y1,double x2,double y2)=0;};class V1Drawing:public Drawing{public:void drawLine(double x1, double y1,double x2, double y2){DP1::draw_a_line(x1,y1,x2,y2);}};class V2Drawing:public Drawing{public:void drawLine(double x1, double y1, double x2, double y2){(2);}};class Shape{private:(3) _dp;public:Shape(Drawing *dp);virtual void draw()=0;void drawLine(double x1, double y1, double x2, double y2);};Shape::Shape(Drawing *dp){_dp = dp;}void Shape::drawLine(double x1, double y1, double x2, double y2){ //画一条直线(4);}class Rectangle: public Shape{private:double _x1,_y1,_x2,_y2;public:Rectangle(Drawing *dp, double x1, double y1,double x2, double y2);void draw();};Rectangle::Rectangle(Drawing *dp, double x1, double y1, double x2, double y2):(5){_x1=x1;_y1=y1;_x2=x2;_y2=y2;}void Rectangle::draw(){//省略具体实现}

下面的例子中using System;class A{public static int X;static A(){X=B.Y+1;}}class B{public static int Y=A.X+1;static B(){}static void Main(){Console.WriteLine("X={0},Y={1}",A.X,B.Y);}}产生的输出结果是什么?

下面哪个方法与题目中的不是重载方法public int max(int x,int y) A.public double max(double x,double y)B.publicintmax(intn,int k)C.publicintmax(intx,int y, int z)D.public double max(double n,double k)

阅读以下函数说明和Java代码,[说明]现要编写一个画矩形的程序,目前有两个画图程序:DP1和DP2,DP1用函数draw_a_line(x1,y1,x2,y2)画一条直线,DP2则用drawline(x1,x2,y1,y2)画一条直线。当实例化矩形时,确定使用DPI还是DP2。为了适应变化,包括“不同类型的形状”和“不同类型的画图程序”,将抽象部分与实现部分分离,使它们可以独立地变化。这里,“抽象部分”对应“形状”,“实现部分”对应“画图”,与一般的接口(抽象方法)与具体实现不同。这种应用称为Bridge(桥接)模式。图7-1显示了各个类间的关系。[图7-1]这样,系统始终只处理3个对象:Shape对象、Drawing对象、DP1或DP2对象。以下是JAvA语言实现,能够正确编译通过。[Java代码]//DP1.Java文件public class DPI{static public void draw_a_line(double x1,double y1,double x2,double y2){//省略具体实现}}//DP2.java文件public class DP2{static public void drawline(double x1,double y1,double x2,double y2){//省略具体实现}}//Drawing.java文件(1) public class Drawing{abstract public void drawLine(double x1,double y1,double x2,double y2);}//V1Drawing.java文件public class V1Drawing extends Drawing{public void drawLine(double x1,double y1,double x2,double y2){DP1.draw_a_line(x1,y1,x2,y2);}}//V2Drawing.java文件public class V2Drawing extends Drawing{public void drawLine(double x1,double y1,double x2,double y2){//画一条直线(2);}}//Shape.java文件abstract public class Shape{abstract public void draw();private (3) dp;Shape(Drawing dp){_dp=dp;}protected void drawLine(double x1,double y1,double x2,double y2){(4);}}//Rectangle.java文件public class Rectangle extends Shape{private double_x1,_x2,_y1,_y2;public Rectangle(Drawing dp,double x1,double y1,double x2,double y2){(5);_x1=x1;_x2=x2;_y1=y1;_y2=y2;}public void draw(){//省略具体实现}}(1)

下面给出的四个关于函数定义形式中,正确的是()。A、double FUN(int x,int y);B、double FUN(int x,int y)C、double FUN(int x;int y);D、double FUN(int x,y)

Which will declare a method that is available to all members of the same package and be referenced without an instance of the class?()A、 abstract public void methoda ();B、 public abstract double inethoda ();C、 static void methoda (double dl) {}D、 public native double methoda () {}E、 protected void methoda (double dl) {}

Which two are valid declarations within an interface definition?() A、 void methoda();B、 public double methoda();C、 public final double methoda();D、 static void methoda(double d1);E、 protected void methoda(double d1);

在接口中以下哪条定义是正确的?()A、void methoda();B、public double methoda();C、public final double methoda();D、static void methoda(double d1);E、protected void methoda(double d1);

以下正确的函数定义形式是()。A、double FUN(int x;int y)B、double FUN(int x,int y)C、double FUN(int x,int y);D、double FUN(int x,y)

在JAVA语言中,以下正确的函数定义形式是()。A、double run(x,y)B、double run(int x;int y)C、double run(int x,int y)D、double run(int x,y)

Which will declare the method that forces a subclass to implement it?()A、 public double methoda ():B、 static void methoda(double d1) {}C、 public native double methoda ():D、 abstract public foid methoda ():E、 protected void methoda (double d1) {}

Which will declare a method that is available to all members of the same package and can be referenced without an instance of the class?()  A、 Abstract public void methoda();B、 Public abstract double methoda();C、 Static void methoda(double d1){}D、 Public native double methoda()  {}E、 Protected void methoda(double d1)  {}

Which will declare a method that forces a subclass to implement it?() A、 Public double methoda();B、 Static void methoda (double d1) {}C、 Public native double methoda();D、 Abstract public void methoda();E、 Protected void methoda (double d1){}

单选题下列方法定义中,方法头不正确的是()。Apublic static x(double a)Bpublic static int x(double y)Cvoid x(double d)

单选题Which will declare a method that forces a subclass to implement it? ()A Public double methoda();B Static void methoda (double d1) {}C Public native double methoda();D Abstract public void methoda();E Protected void methoda (double d1){}

单选题下列选项中,能实现对父类的getSalary方法重写的是(  )。class Employee{public double getSalary(){}}Aclass Manager extends Employee{public int getSalary(double x){}}Bclass Manager extends Employee{public double getSalary(int x,int y){}}Cclass Manager extends Employee{public double getSalary(){}}Dclass Manager extends Employee{public int getSalary(int x,int y){}}

单选题Which will declare the method that forces a subclass to implement it?()A public double methoda ():B static void methoda(double d1) {}C public native double methoda ():D abstract public foid methoda ():E protected void methoda (double d1) {}

单选题Which will declare a method that is available to all members of the same package and be referenced without an instance of the class?()A abstract public void methoda ();B public abstract double inethoda ();C static void methoda (double dl) {}D public native double methoda () {}E protected void methoda (double dl) {}