class Rectangle ｛ public static void main（String [] args） ｛ int [] x ＝ ｛1，2，3｝； x[1] ＝ （x[1] 〉 1） ？ x[2] ： 0； System.out.println（x[1]）； ｝ ｝ 结果为：（） A、0B、1C、2D、3
class Rectangle ｛ public static void main（String [] args） ｛ int [] x ＝ ｛1，2，3｝； x[1] ＝ （x[1] 〉 1） ？ x[2] ： 0； System.out.println（x[1]）； ｝ ｝ 结果为：（）
- A、0
- B、1
- C、2
- D、3
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●试题六阅读以下说明和C＋＋程序，将应填入(n)处的语句写在答题纸的对应栏内。【说明】以下程序的功能是计算三角形、矩形和正方形的面积并输出。程序由4个类组成：类Triangle、Rectangle和Square分别表示三角形、矩形和正方形；抽象类Figure提供了一个纯虚拟函数getArea()，作为计算上述3种图形面积的通用接口【C＋＋程序】#includeiostream．h#includemath．hclass Figure{public：virtual double getArea()=0：∥纯虚拟函数}；class Rectangle： (1) {protected：double height；double width；public：Rectangle(){}；Rectangle(double height，double width){this-height=height；this-width=width；}double getArea(){return (2) ；}}；class Square： (3) {public：Square(double width){(4) ；}}；class Triangle： (5) {double la；double Ib；double lc；public：Triangle(double la，double lb，double lc){This-la=la；this-lb=lb；this-lc=lc；}double getArea(){double s=(la+lb+±c)／2．0；return sqrt(s*(s-1a)*(s-1b)*(s-1c))；}}；void main(){Figure*figures［3］={new Triangle(2，3，3)，new Rectangle(5，8)，new SqUare (5) )；for (int i=0；i3；i＋＋){cout"figures［"i"］area="(figures［i］)-getArea()endl；}}
阅读以下说明和Java程序，将应填入(n)处的字句写在对应栏内[说明]以下程序的功能时三角形、矩形和正方形的面积输出。程序由5个类组成：areatest是主类，类Triangle，Rectangle和Square分别表示三角形、矩形和正方形，抽象类Figure提供了一个计算面积的抽象方法。[Java程序]public class areatest {public static viod main(string args[]){Figure[]Figures={New triangle(2,3,3),new rectangle(5,8),new square(5)};for(int i=0; i＜Figures.length;i++){system.out.println(Figures+"area="+Figures.getarea());}}}public abstract class figure {public abstract double getarea();}public class rectangle extends (1) {double height;double width;public rectangle (double height,double width){this.height=height;this.width=width;}public string tostring(){return"rectangle:height="+height+",width="+width+":";}public double getarea(){return (2)}}public class square exends (3){public square(double width){(4);}public string tostring(){return"square:width="+width":";}}public class triangle entends (5){double la;double lb;double lc;public triangle(double la,double lb,double lc){this.la=la;this.lb=lb;this.lc=lc;}public string tostring()(return"triangle:sides="+la+","+lb+","+lc+":";}public double get area(){double s=(la+lb+lc)/2.0;return math．sqrt(s*(s-la)*(s-lb)*(s-lc));}}
阅读以下说明和Java源程序，将应填入(n)处的字句写在对应栏内。【说明】以下程序能够计算三角形、矩形和正方形的周长并输出。程序由5个类组成：AreaTest是主类，类Triangle、Rectangle和Square分别表示三角形、矩形和正方形，抽象类Figure提供了一个计算周长的抽象方法。【程序】public class girthTest{public static void main (String args[]){Figure[]figures={new Triangle (2，3，3)，new Rectangle(5，8)，new Square(5)}；for(int i=0；i＜figures．length；i++){System．out．println(figures[i]+"girth="+figures[i]．getGirth())；}}}public abstract class Figure{public abstract double getGirth()；}public class Rectangle extends (1) {double height；double width；public Rectangle(double height，double width){this．height=height；this．width=width；}public String toString(){return "Rectangle：height="+height+"，width="+width+"："；}public double getGirth(){return (2)；}}public class Square extends (3) {public Square(double width){(4)；}public Stdng toString(){return "Square：width='+width+"："；}}public class Triangle extends (5) {double la；double lb；double lc；public Triangle(double la，double lb，double lc){this．la=la；this.lb=lb；this．lc=lc；}public String toString(){return "Triangle：sides=" +la+"，" +lb+"，" +lc+"："；}public double getGirth(){return la+lab+lc；}}
使用RECTANGLE命令绘制一个矩形，并使该矩形具有厚度为100。正确的方法为()。A.用RECTANGLE命令先绘一个矩形，然后用ELEV命令设置厚度为100B.用ELEV命令设置厚度为100，然后用RECTANGLE命令绘制矩形C.用RECTANGLE命令先绘一个矩形，然后用CHANGE命令改变厚度为100D.在RECTANGLE命令中先设置其厚度为100，然后再绘制矩形E.用RECTANGLE命令先绘一个矩形，然后再用RECTANGLE命令设置厚度为100
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】以下C++程序的功能是计算三角形、矩形和正方形的面积并输出。程序由4个类组成：类 Triangle、Rectangle和Square分别表示三角形、矩形和正方形：抽象类Figure提供了一个纯虚函数getAxea()，作为计算上述3种图形面积的通用接口。【C++代码】include＜iostream＞include＜cmath＞using namespace std;class Figure{public:virtual double getArea()=0;//纯虚函数};class Rectangle ： (1) {protected:double height;double width;public:Rectangle(){}Rectangle(double height, double width){this-＞height=height;this-＞width=width;}double getArea(){return (2);}};class Square： (3) {public:Square(double width){(4);}};class Triangle： (5) {private:double la,lb,lc;public:Triangle(double la,double lb,double lc){this-＞la=la;this-＞1b=1b;this-＞lc=lc;}double getArea(){double s=(la+lb+lc)/2.0;return sqrt(s*(s-la)*(s-lb)*(s-lc));}int main(){Figure *figures[3]={new Triangle(2,3,3),new Rectangle(5,8), new Square(5)};for(int i=0;i＜3;i++){cout＜＜"figures["＜＜i＜＜"]area="＜＜(figures[i])-＞getArea()＜＜endl;}return 0;}
Youarecreatinganonlinecatalogapplicationthat&ens YouarecreatinganonlinecatalogapplicationthatwilldisplayproductinformationonthecompanyWebsite.TheproductdataisstoredinaSQLServer2005database.ThedataisstoredasrelationaldatabutmustbepassedtotheapplicationasanXMLdocumentbyusingFORXML.YoutestyourapplicationandnoticethatnotalloftheitemsmatchingyourqueryappearintheXMLdocument.Onlythoseproductsthathavevaluesforallelementsintheschemaappear.YouneedtomodifyyourTransact-SQLstatementsothatallproductsmatchingyourqueryappearintheXMLdocument.Whatshouldyoudo？（）
使用VC6打开考生文件夹下的工程test41_3。此工程包含一个test41_3.cpp，其中定义了类Rectangle，但该类的定义并不完整。请按要求完成下列操作，将程序补充完整。(1)定义类Rectangle的私有数据成员left，top和fight，bottom，它们都是int型的数据。请在注释“//**1**”之后添加适当的语句。(2)添加类Rectangle的带四个int型参数1、t、r、b的构造函数的声明，并使这四个参数的默认值均为0，请在注释“//**2**”之后添加适当的语句。(3)添加类Rectangle的成员函数SetTop()参数为int型的t，作用为把t的值赋给类的数据成员top，添加类Rectangle的成员函数SetBottom()参数为int型的t，作用为把t的值赋给类的数据成员bottom，请在注释“//**3**”之后添加适当的语句。(4)完成派生类Rectangle的成员函数Show()的定义，使其以格式“right-bottom point is(right，bottom)”输出，请在注释“//**4**”之后添加适当的语句。源程序文件test41_3.cpp清单如下：include ＜iostream.h＞class Rectangle{// ** 1 **int right, bottom;public:// ** 2 **～ Rectangle(){};void Assign(int 1, int t, int r, int b);void SetLeft(int t){left = t;}void SetRight(int t){right = t;}// ** 3 **void SetBottom(int t){bottom = t;}void Show();};Rectangle::Rectangle(int 1, int t, int r, int b){left = 1; top = t;right = r; bottom = b;}void Rectangle::Assign(int 1, int t, int r, int b){left = 1; top = t;right = r; bottom = b;}void Rectangle::Show(){cout＜＜"left-top point is ("＜＜left＜＜","＜＜top＜＜")"＜＜'\n';// ** 4 **}void main(){Rectangle rect;rect.Show();rect.Assign(100,200,300,400);rect.Show();}
下面程序段中,说法正确的是( ) 。class location{ public : int GetX(); }; class rectangle:private location { public: int GetW(); }; A.类rectangle的私有派生类是locationB.类rectangle中的public成员在类location中是私有的C.类location中的public成员在类rectangle中是不可访问的D.viodf(){Rectangler;intX=r.GetX();}其中intX=r.GetX();是非法语句
阅读以下说明和C++代码，填入(n)处。[说明]以下C++代码使用虚函数实现了同一基类shape派生出来的Class rectangle、Class triangle、Class circle实现了计算矩形、圆形面积的计算。仔细阅读以下代码，将(n)处语句补充完整。[代码5-1]include＜iostream.h＞define PI 3.14159class shape {//基类protected：(1)；public：(2)；(3)；}；[代码5-2]class rectangle: public shape {public:rectangle (int x2,int y2,int r2): (4) {};double area ( ) {return x*y; };};class circle: public shape {public:circle (int x3,int y3,int r3):(5){};double area ( ) {return r*r*PI; };};[代码5-3]void main ( ){rectangle r (10,20,0);circle c (0,0,30);shape (6)；cout＜＜"长方形面积="＜＜s1-＞area ( ) ＜＜endl；cout＜＜"圆形面积="＜＜s2-＞area ( ) ＜＜endl；}[运行结果]长方形面积=200圆形面积=2827.43
下列程序的运行结果为 include class Location { protected: int X,Y; 下列程序的运行结果为 #include＜iostream．h＞ class Location { protected： int X，Y； publiC： void SeX(int myx){X=myx；} void SetY(int myy){Y=myy；} void showxy( ) {cout＜＜"X=" ＜＜X＜＜" " ＜＜"Y"=＜＜ Y＜＜ endl；} }； Class Rectangle ：public Location{A．X=3 Y=5 X=3 Y=5 H=4 W=6B．X=3 Y=5 X=3 Y=5 H=3 W=6C．X=3 Y=5 X=3 Y=4 H=4 W=6D．X=3 Y=5 X=3 Y=3 H=4 W=6
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)}
使用VC6打开考生文件夹下的工程test1_1，此工程包含一个源程序文件test1_1．cpp，但该程序运行有问题，请改正main函数中的错误，使该程序的输出结果如下：Constructor called.Default constructor called.Area is 6Area is 0Area is 6源程序文件test1_1,cpp清单如下：include＜iostream.h＞class RectAngle{private:double ledge,sedge;public:RectAngle(){cout＜＜"Default constructor called.";}RectAngle(double l,double s){ledge=l;sedge=s;cout＜＜"Constructor called.";}void Set(double l,double s){ledge=l;sedge=s;}void Area(){cout＜＜"Area is"＜＜ledge*sedge＜＜endl;}};void main(){／***************** found *****************／RectAngle Rect1(2,3);RectAngle Rect2(1);／**************** found *****************／RectAnglC Rect3;Rectl.Area();／***************** found *****************／RecL2.lodge=0;Rect2.sedge=0;Reck2.Area();Rect3.Area();}
本题的功能是监听鼠标的操作。鼠标置于窗口中单击时(左键或右键)，在单击的地方会画一个小矩形，如果将鼠标置于小矩形上，则鼠标光标状态改为小十字，按下鼠标左键可拖曳，双击鼠标左键(或右键)时，小矩形消失。 import java．awt．*； import java．awt．event．*； import java．util．*； import java．awt．geom．*； import javax．swing．*； public class java3 { public static void main(String[]args) { MouseFrame. frame=new MouseFrame： frame．setDefaultCloseOperation(JFrame．EXIT_ oN_CLOSE)； frame．show； } } class MouseFrame. extends JFrame { public MouseFrame { setTitle("java3")； setSize(DEFAULT WIDTH， DEFAULT HEIGHT)： MousePanel panel=new MousePanel； Container contentPane=getContentPane； contentPane．add(panel)； } public static final int DEFAULT_WIDTH=300； public static final int DEFAULT_HEIGHT=200； } class MousePanel extends JPanel { public MousePanel { squares=new ArrayList； current=null： addMouseListener(new MouseHandler)； addMouseMotionListener(new MouseMotionHan- dler)； } public void paintComponent(Graphics g) { super．paintComponent(g)； Graphics2D g2=(Graphics2D)g； for(int i=0；isquares．size；i++) g2．draw((Rectangle2D)squares．get(i))； } public void find(Point2D p) { for(int i=0；isquares．size；i++) { Rectangle2D r=(Rectangle2D)squares．get(i)； if(r．contains(p))return r； } return null： } public void add(Point2D p) { double x=P．getX； double Y=P．getY： current=new Rectangle2D．Double( x-SIDELENGTH／2． y-SlDELENGTH／2． S1DELENGTH， SIDELENGTH)； squares．add(current)； repaint； } public void remove(Rectangle2D s) { if(S= =null)return： if(S= =current)current=null； squares．remove(s)： repaint； } private static final int SIDELENGTH=10： private ArrayList squares； private Rectangle2D current； private class MouseHandter extends MouseAction- Listener { public void mousePressed(MouseEvent event) { current=find(event．getPoint)； if(current= =null) add(event．getPoint)； } public void mouseClicked(MouseEvent event) { current=find(event．getPoint)； if(current!=nullevent．getClickCount =2) remove(current)； } } private class MouseMotionHandler implements Mouse- MotionListener { public void mouseMoved(MouseEvent event) { if(find(event．getPoint)= =null) setCursor(Cursor．getDefaultCursor)； else setCursor(Cursor．getPredefinedCursor (Cursor．CROSSHAIR_CURSOR))； } public void mouseDragged(MouseEvent event) { if(current!=null) { int x=event．getX： int Y=event．getY； 、 current．setFrame( x-SIDELENGTH／2， Y-SlDELENGTH／2． SIDELENGTH， SIDELENGTH)； repaint； } } } }
Alloftheclientcomputersinyourcompany’s&ens Alloftheclientcomputersinyourcompany’snetworkareWindows2000portablecomputers.AusernamedMariastoresSalesfilesinherMyDocumentsfolder.Sheusesthesefileswhenshetravels.Mariainformsyouthatwhenshetakesherportablecomputertotradeshows,shecanaccesssomeoftheSalesfilesbutnotallofthem.Whenherportablecomputerisconnectedtothenetworkattheoffice,shecanaccessallofthefiles.YouneedtoenableMariatoaccessallofthefilesinherMyDocumentsfolderwhensheisworkingremotely.Whatshouldyoudo?（）
Which statements concerning the effect of the statement gfx.drawRect（5， 5， 10， 10） are true， given that gfx is a reference to a valid Graphics object？（） A、The rectangle drawn will have a total width of 5 pixels.B、The rectangle drawn will have a total height of 6 pixels.C、The rectangle drawn will have a total width of 10 pixels.D、The rectangle drawn will have a total height of 11 pixels.
单选题The length of a rectangle is 5 more than the side of a square, and the width of the rectangle is 5 less than the side of the square. If the area of the square is 45, what is the area of the rectangle?A20B25C45D50E70
问答题A rectangle is equal in area to a square with sides of length 12. Is the diagonal of the rectangle greater in length than 20? (1) The rectangle has a length of 16. (2) The rectangle has a width of 9.
单选题A white buoy with an orange rectangle on it displays（）.AdirectionsBdangersCexclusion areasDAll of the above
单选题The base of a rectangle is two times as long as the height. If the perimeter is 42, what is the area of the rectangle?A36B42C98D196E218
单选题Which statements concerning the effect of the statement gfx.drawRect（5， 5， 10， 10） are true， given that gfx is a reference to a valid Graphics object？（）AThe rectangle drawn will have a total width of 5 pixels.BThe rectangle drawn will have a total height of 6 pixels.CThe rectangle drawn will have a total width of 10 pixels.DThe rectangle drawn will have a total height of 11 pixels.
单选题If the area of a square with sides of length 8 centimeters is equal to the area of a rectangle with a width of 4 centimeters, what is the length of the rectangle, in centimeters?A4B8C12D16E18
多选题Which three demonstrate an “is a” relationship？（）Apublic class X { } public class Y extends X { }Bpublic interface Shape { } public interface Rectangle extends Shape{ }Cpublic interface Color { } public class Shape { private Color color； }Dpublic interface Species { } public class Animal { private Species species； }Epublic class Person { } public class Employee { public Employee（Person person） { }Finterface Component { } class Container implements Component { private Component[] children； }
多选题Which the two demonstrate an “is a” relationship？（）Apublic interface Person {} Public class Employee extends Person {}Bpublic interface Shape {} public interface Rectangle extends Shape {}Cpublic interface Color {} public class Shape { private Color color； }Dpublic class Species {} public class Animal { private Species species； }Einterface Component {} Class Container implements Component {private Component [] children；
单选题按住Ctrl键Rectangle可以画（）。A矩形