Question

我正在做一个家庭作业项目。给出了测试代码，我基本上必须使其工作。

我一直坚持创建add方法，我无法弄清楚如何使用测试页上的输入。任何帮助，将不胜感激。这是测试代码：

import java.util.Scanner;

// Test the Complex number class

public class ComplexTest {
   public static void main(String[] args) {
      // use Scanner object to take input from users
      Scanner input = new Scanner(System.in);
      System.out.println("Enter the real part of the first number:");
      double real = input.nextDouble();
      System.out.println("Enter the imaginary part of the first number:");
      double imaginary = input.nextDouble();      
      Complex a = new Complex(real, imaginary);
      System.out.println("Enter the real part of the second number:");
      real = input.nextDouble();
      System.out.println("Enter the imaginary part of the second number:");
      imaginary = input.nextDouble();      
      Complex b = new Complex(real, imaginary);

      System.out.printf("a = %s%n", a.toString());
      System.out.printf("b = %s%n", b.toString());
      System.out.printf("a + b = %s%n", a.add(b).toString());
      System.out.printf("a - b = %s%n", a.subtract(b).toString());
   } 
}

这是我到目前为止所拥有的：

public class Complex {
    private double real;
    private double imaginary;

    public Complex() {
        this(0,0);
    }

    public Complex(double real) {
        this(real,0);
    }

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

    public void setReal(double real) {
        this.real = real;
    }

    public void setImaginary(double imaginary) {
        this.imaginary = imaginary;
    }

    public double add(double a, double b) {
        return a + b;
    }
}

Answer 1

如果我的理解正确，您可能希望您的add方法同时采用和返回Complex对象。试试这个：

public Complex add(Complex other) {
    return new Complex(this.real + other.real, this.imaginary + other.imaginary);
}

这将创建一个新的Complex实例。要就地修改，请使用以下命令：

public Complex add(Complex other) {
    this.real += other.real;
    this.imaginary += other.imaginary;
    return this;
}

Java a.add（b）方法

1 个答案: