家庭作业帮助（复杂class）

延续与本计划相关的问题

首先，如果我把它放在错误的区域，我想道歉。 这是我的第一篇文章，我还没有弄清楚一切是如何运作的。

我在这项作业任务中苦苦挣扎……

**(Math: The Complex class) A complex number is a number in the form a + bi, where a and b are real numbers and i is 2-1. The numbers a and b are known as the real part and imaginary part of the complex number, respectively. You can perform addition, subtraction, multiplication, and division for complex numbers using the following formulas: 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 (a + bi)/(c + di) = (ac + bd)/(c2 + d2) + (bc - ad)i/(c2 + d2) You can also obtain the absolute value for a complex number using the following formula: a + bi = 2a2 + b2 Design a class named Complex for representing complex numbers and the methods add, subtract, multiply, divide, and abs for performing complexnumber operations, and override toString method for returning a string representation for a complex number. The toString method returns (a + bi) as a string. If b is 0, it simply returns a. Your Complex class should also implement the Cloneable interface. Provide three constructors Complex(a, b), Complex(a), and Complex(). Complex() creates a Complex object for number 0 and Complex(a) creates a Complex object with 0 for b. Also provide the getRealPart() and getImaginaryPart() methods for returning the real and imaginary part of the complex number, respectively. Write a test program that prompts the user to enter two complex numbers and displays the result of their addition, subtraction, multiplication, division, and absolute value.** 

这是我到目前为止所拥有的。 两节课……

 // ComplexTest.java import java.util.Scanner; public class ComplexTest { public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.println("Enter the first complex number: "); double realPart = input.nextDouble(); System.out.println("Enter the second complex number: "); double imaginaryPart = input.nextDouble(); Complex cn1 = new Complex(realPart, imaginaryPart); Complex cn2 = new Complex(realPart); Complex cn3 = new Complex(); if (realPart == 0) { System.out.println(cn3.toString()); } if (imaginaryPart == 0) { System.out.println(cn2.toString()); } if(realPart != 0 && imaginaryPart != 0) { System.out.println(cn1.toString()); } } } // Complex.java import java.util.Scanner; public class Complex { // cloneable interface public interface Cloneable { } // Instance Real + Getters and Setters (Accessors and Mutators) private double realPart; public double getReal() { return realPart; } public void setReal(double real) { this.realPart = real; } // Instance Real + Getters and Setters (Accessors and Mutators) private double imaginaryPart; public double getImaginary() { return imaginaryPart; } public void setImaginary(double imaginary) { this.imaginaryPart = imaginary; } // Constructor Method CN1 public Complex(double a, double b) { realPart = a; imaginaryPart = b; } // Constructor Method CN2 public Complex(double a) { realPart = a; imaginaryPart = 0; } // Constructor Method CN3 public Complex() { } // Add Complex Numbers public Complex add(Complex comp1, Complex comp2) { double real1 = comp1.getReal(); double real2 = comp2.getReal(); double imaginary1 = comp1.getImaginary(); double imaginary2 = comp2.getImaginary(); return new Complex(real1 + real2, imaginary1 + imaginary2); } // Subtract Complex Numbers public Complex subtract(Complex comp1, Complex comp2) { double real1 = comp1.getReal(); double real2 = comp2.getReal(); double imaginary1 = comp1.getReal(); double imaginary2 = comp2.getReal(); return new Complex(real1 - real2, imaginary1 - imaginary2); } // Multiply Complex Numbers public Complex multiply(Complex comp1, Complex comp2) { double real1 = comp1.getReal(); double real2 = comp2.getReal(); double imaginary1 = comp1.getReal(); double imaginary2 = comp2.getReal(); return new Complex(real1 * real2, imaginary1 * imaginary2); } // Divide Complex Numbers public Complex divide(Complex comp1, Complex comp2) { double real1 = comp1.getReal(); double real2 = comp2.getReal(); double imaginary1 = comp1.getReal(); double imaginary2 = comp2.getReal(); return new Complex(real1 / real2, imaginary1 / imaginary2); } // toString to Change Display public String toString() { String result; result = realPart + " + " + imaginaryPart + "i"; return result; } } 

这是我在Jan的帮助下更新的代码。 我已经创建了3种方法（减法，乘法和除法）。 我是不是应该在每种方法中使用comp1和comp2而是将它们彼此分开命名？ 目标是在最后同时打印每种方法的结果。 具有相同名称的这些是否会混乱？

我还想知道何时应该实现可克隆接口。

最后，根据文本，复数实际上看起来像是由空格分隔的两个数字。 （即3.5 5.0而不是3.5）。 如果我为两个复数的后半部分再添加两个扫描仪输入，我将不得不更改我的代码。 我是否必须创建新的getter和setter来接收这个号码？ 如imamblearyPart2和realPart2？

再次感谢您的帮助。

Answer 1

编译错误的一些提示：

  Complex real1 = realPart; Complex real2 = (Complex) realPart.clone(); Complex imaginary1 = imaginaryPart; Complex imaginary2 = (Complex) imaginaryPart.clone(); double realTotal = real1 + real2; double imaginaryTotal = imaginary1 + imaginary2; 

你的成员变量real1,2，imaginary1,2需要是double类型而不是Complex类型

现在它编译 – 但它不会工作。 您想要添加复数。 所以重命名你的方法签名：

 public Complex add(Complex comp1, Complex comp2) { double real1 = comp1.getReal(); double real2 = comp2.getReal(); double imaginary1 = comp1.getImaginary(); double imaginary2 = comp2.getImaginary(); return new Complex(real1+real2, imaginary1 +imaginary2); } 

现在继续进行工具倍增……