Question

急！！！！！！高手指教（JAVA）

3、设计复数类（ComplexNumber），成员变量包括实部（real ）和虚部（imaginary），成员方法包括实现复数加法（add(ComplexNumber obj)）、减法（sub(ComplexNumber obj)）、乘法（multiply(ComplexNumber obj)） 、成串（toString()）等操作。
（a＋bi）＋（c＋di）＝（a＋c）＋（b＋d）i，
（a＋bi）－（c＋di）＝（a－c）＋（b－d）i，
（a＋bi）?（c＋di）＝（ac－bd）＋（bc＋ad）i

Answer 1

import java.io.*;
import java.util.*;

public class Main {
public static void main(String[] args) {
ComplexNumber cpx1, cpx2;
cpx1 = new ComplexNumber(0.0, 1.2);
cpx2 = new ComplexNumber();
cpx2.real = 8.5; cpx2.imaginary = 1.2;

System.out.println(cpx2.add(cpx1));
System.out.println(cpx2.sub(cpx1));
System.out.println(cpx2.multiply(cpx1));
}
}

class ComplexNumber {
public double real, imaginary;

public ComplexNumber(double _r, double _i) {
real = _r;
imaginary = _i;
}
public ComplexNumber() {}

public ComplexNumber add(ComplexNumber obj) {
return new ComplexNumber(real + obj.real, imaginary + obj.imaginary);
}
public ComplexNumber sub(ComplexNumber obj) {
return new ComplexNumber(real - obj.real, imaginary - obj.imaginary);
}
public ComplexNumber multiply(ComplexNumber obj) {
return new ComplexNumber(real * obj.real - imaginary * obj.imaginary,
imaginary * obj.real + real * obj.imaginary);
}
public String toString() {
return (real + " + " + imaginary + "i");
}
}

Answer 2

这应该是作业题吧，想学好程序设计，要自己认真动手动脑。
下面是我个人的一点想法
public class ComplexNumber{
private double real;
private double imaginary;

public ComplexNumber(){}
public ComplexNumber(double real, double imaginary){
this.real = real;
this.imaginay = imaginary;
}

public ComplexNumber add(ComplexNumber obj){
return new ComplexNumber(this.real+this.imaginary,obj.real+obj.imaginary);
}
//其他的自己尝试去写
public String toString(){
return real+"+"imaginary+"i";
}
}

Answer 3

这应该是作业题吧，想学好程序设计，要自己认真动手动脑。
下面是我个人的一点想法
public class ComplexNumber{
private double real;
private double imaginary;

public ComplexNumber(){}
public ComplexNumber(double real, double imaginary){
this.real = real;
this.imaginay = imaginary;
}

public ComplexNumber add(ComplexNumber obj){
return new ComplexNumber(this.real+this.imaginary,obj.real+obj.imaginary);
}

public String toString(){
return real+"+"imaginary+"i";
试一试

Answer 4

唉 想当初刚学JAVA时，不管会不会的，我都是来这里回答问题以帮助自己进步。那时我也是一级。。。还是楼主自己好好学吧。

Answer 5

12