有以下程序；#includeiostreamusingnamespacestd；classComplex{public：Complex(doubler=0，doublei=O)：re(r)，im(i){}doublereal（）const{returnre；}doubleimag（）const{returnim；}Complexoperator＋(Complexc)const{returnComplex(re＋C．re，im＋C．im)；}private：doublere，im；}；intmain（）{Complexa=Complex(1，1)＋Complex(5)；couta．real（）＋a．imag（）iendl；return0；}程序执行后的输出结果是（ ）。A.6＋6iB.6＋1iC.1＋6iD.1＋1i
有以下程序；
#include<iostream>
usingnamespacestd；
classComplex
{
public：
Complex(doubler=0，doublei=O)：re(r)，im(i){}
doublereal（）const{returnre；}
doubleimag（）const{returnim；}
Complexoperator＋(Complexc)const
{returnComplex(re＋C．re，im＋C．im)；}
private：
doublere，im；
}；
intmain（）
{
Complexa=Complex(1，1)＋Complex(5)；
cout<<a．real（）<<'＋'<<a．imag（）<<'i'<<endl；
return0；
}
程序执行后的输出结果是（ ）。
A.6＋6i
B.6＋1i
C.1＋6i
D.1＋1i
相关考题：
有如下程序：#includeusing namespace std;class Complex{double re, im;public:Complex(double r, double i):re(r), im(i){}double real() const{return re;}double image() const{return im;}Complex operator +=(Complex a){re += a.re;im += a.im;return *this;}};ostream operator(ostream s,const Complex z){return s'('}int main(){Complex x(1, -2), y(2, 3);cout(x += y)return 0;}执行这个程序的输出结果是A ． (1, -2)B ． (2, 3)C ． (3, 5)D ． (3, 1)
下面是复数类 complex 的定义 ， 其中重载的运算符 “ + ” 的功能是返回一个新的复 数对象 ， 其实部等于两个操作对象实部之和，其虚部等于两个操作对象虚部之和；请补充完整：class complex{double real; // 实部double imag; // 虚部public:complex(double r,double i):real(r),imag(i){}complex operator+(complex a){return complex( 【 14 】 );}};
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；}}
阅读下列Java程序和程序说明，将应填入(n)处的字句写在对应栏内。【说明】下面的程序先构造Point类，再顺序构造Ball类。由于在类Ball中不能直接存取类Point中的xCoordinate及yCoordinate属性值，Ball中的toString方法调用Point类中的toString方法输出中心点的值。在MovingBall类的toString方法中，super.toString调用父类Ball的toString方法输出类Ball中声明的属性值。public class Point{private double xCoordinate;private double yCoordinate;public Point 0 }public Point(ouble x, double y){xCoordinate = x;yCoordinate = y;}public String toString(){return "( + Double.toString(Coordinate)+ ","+ Double.toString(Coordinate) + ");}//other methods}public class Ball{(1); //中心点private double radius; //半径private String colour; ///颜色public Ball() { }public Ball(double xValue, double yValue, double r)// 具有中心点及半径的构造方法{center=(2);//调用类Point 中的构造方法radius = r;}public Ball(double xValue, double yValue, double r, String c)// 具有中心点、半径及颜色的构造方法{(3)；//调用3个参数的构造方法colour = c;}public String toString(){return "A ball with center" + center, toString() + ", radius"+ Double.toString(radius) + ", colour" + colour;}//other methods}public class MovingBall. (4){private double speed;public MovingBall() { }public MovingBall(double xValue, double yValue, double r, String e, double s){(5);// 调用父类Ball中具有4个参数的构造方法speed = s;}public String toString( ){ return super, toString( ) + ", speed "+ Double.toString(speed); }//other methods}public class Tester{public static void main(String args[]){MovingBall mb = new MovingBall(10,20,40,"green",25);System.out.println(mb);}}
有以下程序include using namespace std;class Complex{public: Complex(double r=O, 有以下程序 #include＜iostream＞ using namespace std； class Complex { public： Complex(double r=O,double i＝0)：re(r),im(i){} double real() const {return re；} double imag()const {return im；} Complex operator ＋(Complex C) const {return Complex (re＋c.re,im＋c.im)；} private： double re,im； }； int main() { Complex a=Complex(1，1)＋Complex (5)； cout＜＜a．real()＜＜'＋'＜＜a.imag()＜＜'i'＜＜endl； retum 0； } 程序执行后的输出结果是A．6＋6iB．6＋1iC．1＋6iD．1＋1i
（ 13 ）有如下复数类的声明，请补充完整。class complex{double real; // 实部double imag; // 虚部public:complex(double x , double y){real=x;imag=y;}perator+(complex c){// 重载加法运算符 “ + ”return complex(___________)}};
下列是定义一个接口ITF的程序，在横线处应填入的选项是 ( )public interface ITF{public static final double PI=3.14，public ______ double area(double a，double b)；}A．interfaeeB．staticC．finalD．abstract
有以下程序include using namespacestd;class Complex{public:Complex (doubler=0, d 有以下程序 #include ＜iostream＞ using namespace std; class Complex { public: Complex (double r=0, double i =0 :re(r) ,im (i) {} double real() const {return re;} double imag() const { return im;} Complex operator + (Complex c} const {return Complex(re+c.re, im+c.im);} privane: double re,im; }; int main { Complex a =Complex (1,1)+Complex(5); cout＜＜a.real()＜＜'+'＜＜a.imag() ＜＜ 'i' ＜＜endl return 0; } 程序执行后的输出结果是A．6+6iB．6+1iC．1+6iD．1+1i
有以下程序include using namespace std;class Complex{public:Complex(double r=0,d 有以下程序#include ＜iostream＞using namespace std;class Complex{public: Complex(double r=0,double i=0):re(r),im(i){ double real() const {return re;} double imag() const { return im; } Complex operator+(Complex c) const {return Complex(re+c.re,im+c.im);}private: double re,im;};int main(){ Complex a =Complex(1,1)+ Complex(5); cout＜＜a.real()＜＜'+'＜＜a.imag()＜＜'i'＜＜end1; retura 0;}A．6+6iB．6+1iC．1+6iD．1+1i
有以下程序： #includeiostream usingnamespacestd； classA{ public： A（ ）{cout"A"；} }； classB{public：B（ ）{cout"B"；}}； classC：publicA{ Bb； public： C（ ）{cout"C"；} }； intmain（ ）{Cobj；return0；} 执行后的输出结果是（ ）。A.CBAB.BACC.ACBD.ABC
有如下程序: include using namespace std; class Complex { double re, im, public 有如下程序： #include ＜iostream＞ using namespace std; class Complex { double re, im, public: Complex(double r, double i): re(r), im(i) {} double real() const {return re;} double image() const {return im,} Complex operator +=(Complex a) { re +=a.re; im +=a.im; return *this; } }; ostream operator ＜＜ (ostream s, const Complex z) { return s＜＜'('＜＜z.real()＜＜','＜＜z.image()＜＜')'; } int main() { Complex x(1,-2), y(2,3); cout ＜＜ (x+=y) ＜＜ endl; return 0; } 执行这个程序的输出结果是( )。A．(1，-2)B．(2，3)C．(3，5)D．(3，1)
阅读以下说明和Java代码，将应填入(n)处的字句写在对应栏内。[说明]本程序的功能是给公司的员工Tom，Jack，Green增加薪水。三人的职位分别是programmer， Manager，CEO。程序由6个类组成：WorkerTest是主类，programmer，Manager，CEO三个类，薪水增加的规则是 programmer的涨幅是5%；Manager的是10%；CEO也是Manager，但是它除了有Manager的涨幅，还有1000元的bonus。接口SalaryRaise提供了一个增加薪水的方法raise()。[java程序]public class WorkerTest {public WorkerTest( ) {}public static void main( String[] args) {Programmer programmer = new Programmer( "Tom" ,3000);Manager manager = new Manager( "Jack" ,4000);CEO ceo = new CEO( "Green" ,4000);Worker [] worker = new Worker[3];programmer, raise( );manager, raise( );ceo. raise( );worker[0] = programmer;worker [1] = manager;worker[2] = ceo;for ( int i = 0 ;i ＜ worker, length; i + + ) {System. out. prinfln (" Name:" + worker [i]. getName ( ) +" \ tSalary:" + worker [i]. getSalary ());public interface SalaryRaise { void raise( ); }public class Worker {public String name;public double (1);public Worker( ) {}public String getName( ) {return name;}public void setName( String name) {this. name = name;}public double getSalary( ) {return salary;}public void setSalary(double salary) { this. salary = salary; }}public class Programmer extends Worker implements (2) {public Programmer( ) {}public void raise( ) {double pets=0.05;double sala = this. getSalary( ) * (1 + pers);this. setSalary (sala);public Programmer( Siring name, double salary) tthis. name = name;this. salary = salary;public class Manager extends (3) implements SalaryRaise {public Manager( ) { }public Manager(String name, double salary) {this. name = name;this. salary = salary;}public void raise( ) {double pets = 0.1;double sala = this. getSalary() * (1 + pers);this. setSalary(sala);}}public class CEO extends Manager implements SalaryRaise {public CEO() {}public CEO( String name,double salary) {this. name = name;this. salary = salary;}public void raise( ) {double bonus = 1000;(4);double sala = this. getSalary( );(5);this. setSalary(sala);}}
有如下程序: include using namespace std; class Complex { double 有如下程序： #include＜iostream＞ using namespace std； class Complex { double re,im； public： Complex(double r,double i):re(r),im(i){} double real()const{return re;} double image()const{return im;} Complex operator+=(Complex a) { re+=a.re; im+=a.im; return *this; } }; ostream operator＜＜(ostream s,const Complex z) { return s＜＜'('＜＜z.real()＜＜','＜＜z.image()＜＜')'; } int main() { Complex x(1,2),y(2,3)； tout＜＜(x+=y)＜＜endl； return 0； } 执行这个程序的输出结果是( )。A．(1,-2)B．(2,3)C．(3,5)D．(3,1)
下列是定义一个接口ITF的程序，在横线处应填入的选项是( )。 publid interface ITF { public static final double PI=3.14; public______double area(double a，double B) ; }A．interfaceB．staticC．finalD．abstract
有以下程序,输出结果()。includeusing namespace std;class Complex{public:Complex(d 有以下程序，输出结果( )。 #include＜iostream＞ using namespace std; class Complex { public: Complex(double r=0,double i=0):re(r),im(i){} double real()const{return re;} double imagoconst{return im;} Complex operator+(Complex C) const {return Complex(re+c.re,im+c.im);} private: double re,im; }; int main() { Complex a=Complex(1,1)+Complex(5); cout＜＜a.real()＜＜'+'＜＜a.imag()＜＜'i'＜＜end1; return 0; }A．6+iB．2i+5C．6+1iD．1i+5
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)}
若有以下程序： #includeiostream usingnamespacestd； classBase {public： Base（） {x=0；} intx；}； classDerivedl：virtualpublicBase {public： Derivedl（） {x=10；}}； classDerived2：virtua11publicBase {public： Derived2（） {x=20；}}； classDerived：publicDerivedl，protectedDerived2{}；intmain（） {Derivedobj； coutobj．xendl； return0；} 该程序运行后的输出结果是（ ）。A.20B.30C.10D.0
在下列程序的横线处填上适当的内容，使程序执行后的输出结果为ABCD（ ）。 #includeiostream usingnamespacestd； classA { public：A（）{coutA；} }； classB： { public：B（）{coutB；} }； classC：virtualpublicA { public：C（）{coutC；} }； classD：publicB，publicD { public：D（）{coutD；} }； voidmain（）{D04；}A.publicAB.privateAC.protectedAD.virtualpublicA
有以下程序； #includeiostream usingnamespacestd； classComplex { public： Complex(doubler=0，doublei=O)：re(r)，im(i){} doublereal（）const{returnre；} doubleimag（）const{returnim；} Complexoperator＋(Complexc)const {returnComplex(re＋C．re，im＋C．im)；} private： doublere，im； }； intmain（） { Complexa=Complex(1，1)＋Complex(5)； couta．real（）＋a．imag（）iendl； return0； } 程序执行后的输出结果是（ ）。A.6＋6iB.6＋1iC.1＋6iD.1＋1i
有以下程序:includeusing namespace std;class sample{private:int x;public:sample( 有以下程序： #include＜iostream＞ using namespace std； class sample { private： int x； public： sample(int A) { x=a； friend double square(sample s)； }； double square(sample s) { return S.X*S.K； } int main() { saA．20B．30C．900D．400
有以下程序:includeincludeusing namespace std; class point{private:double 有以下程序： #include＜iostream＞ #include＜math＞ using namespace std； class point { private： double x； double y； public： point(double a,double B) { x=a； y=b； } friend double distance (point a,point B) ；A．1B．5C．4D．6
有下列程序:includeusing namespace std;class Complex{double re,im;public:Complex 有下列程序： #include＜iostream＞ using namespace std; class Complex { double re,im; public: Complex(double r,double i):re(r),im(i){} double real()const{retum re;} double image()const{return im;} Complex operator+=(Complex A) { rA．(1,-2)B．(2,3)C．(3,5)D．(3,1)
有以下程序include using namespace std; class sample { private: int x; public: 有以下程序 #include ＜iostream＞ using namespace std; class sample { private: int x; public: sample(int a) { x=a; } friend double square(sample s); }; double square(sample s) { return s.x*s.x; } int main() { sample s1 (20),s2(30); cout＜＜square(s2)＜＜end1; return 0; } 执行结果是A．20B．30C．900D．400
有如下程序: include using namespace std; class Complex { dou 有如下程序: #include＜iostream＞ using namespace std; class Complex { double re, im; public: Complex(double r, double i): re(r), im(i) {} double real() const { return re; } double image() const { return im; } Complex operator+= (Complex a) { re += a.re; im += a.im; return *this; } }; ostream operator＜＜(ostream s, const Complex z) { remm s＜＜'('＜＜z.real()＜＜','＜＜z.image()＜＜')'; } int main() { Complex x(1,-2), y(2,3); cout＜＜(x+=y)＜＜endl; return 0; } 执行这个程序的输出结果是A．(1,-2)B．(2,3)C．(3,5)D．(3,1)
有以下程序:includeusing namespace std;class Complex{public:Complex(dOuble r=0,d 有以下程序： #include＜iostream＞ using namespace std； class Complex { public： Complex(dOuble r=0，dOuble i=0)：re(r)，im(i){} doublereal()const{return re；} doubleimag()const{return im；} Complex operator+(Complex c)const {return ComplexA．6+6iB．6+1iC．1+6iD．1+1i
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);