1.定义复数类complex，实现以下功能： (1)构造函数 (2)加减乘除取模等函数 (3)tostring()函数 (4)equals()函数 (5)编写测试类，实现键盘读取数据创建复数

(1) 构造函数可以用来创建complex对象，例如：c = complex(3, 4)，c的实部为3，虚部为4。
(2) 加减乘除等函数可以以复数的形式实现，例如：c1 = complex(3, 4), c2 = complex(1, 2), c3 = c1 + c2，c3的实部为4，虚部为6。
(3) tostring()函数可以将复数转换为字符串形式输出，例如：c = complex(3, 4), print(c.tostring())，输出结果为"3+4j"。
(4) equals()函数可以用于比较两个复数是否相等，例如：c1 = complex(3, 4), c2 = complex(3, 4), print(c1.equals(c2))，输出结果为True。
(5) 可以创建一个测试类来实现键盘读取数据和创建复数对象的功能，例如：class TestComplex: def __init__(self): self.real = float(input("请输入实部：")) self.imaginary = float(input("请输入虚部：")) self.complex = complex(self.real, self.imaginary)。

相关问题

编写一个复数类ComplexNumber,满足以下要求: (1)覆盖其Object.toString()方法,向外界返回“a+bi”形式的字串,此方法的声明为:public String toString() (2)提供相应方法,完成复数的加减乘除和取模运算。

好的，我明白了您的要求。以下是ComplexNumber类的代码：

public class ComplexNumber {
    private double real;  // 实部
    private double imag;  // 虚部

    // 构造函数
    public ComplexNumber(double real, double imag) {
        this.real = real;
        this.imag = imag;
    }

    // 覆盖toString()方法，返回“a bi”形式的字符串
    public String toString() {
        if (imag >= 0) {
            return String.format("%.2f + %.2fi", real, imag);
        } else {
            return String.format("%.2f - %.2fi", real, -imag);
        }
    }

    // 加法运算
    public ComplexNumber add(ComplexNumber other) {
        double newReal = real + other.real;
        double newImag = imag + other.imag;
        return new ComplexNumber(newReal, newImag);
    }

    // 减法运算
    public ComplexNumber subtract(ComplexNumber other) {
        double newReal = real - other.real;
        double newImag = imag - other.imag;
        return new ComplexNumber(newReal, newImag);
    }

    // 乘法运算
    public ComplexNumber multiply(ComplexNumber other) {
        double newReal = real * other.real - imag * other.imag;
        double newImag = real * other.imag + imag * other.real;
        return new ComplexNumber(newReal, newImag);
    }

    // 除法运算
    public ComplexNumber divide(ComplexNumber other) {
        double denom = other.real * other.real + other.imag * other.imag;
        double newReal = (real * other.real + imag * other.imag) / denom;
        double newImag = (imag * other.real - real * other.imag) / denom;
        return new ComplexNumber(newReal, newImag);
    }

    // 取模运算
    public double modulus() {
        return Math.sqrt(real * real + imag * imag);
    }
}

希望我能够回答您的问题。

java声明复数的类complex，实现复数的加减乘除运算。

以下是JAVA声明复数的类Complex，实现复数的加减乘除运算：

public class Complex {
    private double real; // 实部
    private double imaginary; // 虚部

    // 构造函数
    public Complex(double real, double imaginary) {
        this.real = real;
        this.imaginary = imaginary;
    }

    // 获取实部
    public double getReal() {
        return real;
    }

    // 获取虚部
    public double getImaginary() {
        return imaginary;
    }

    // 复数加法
    public Complex add(Complex other) {
        double realPart = this.real + other.real;
        double imaginaryPart = this.imaginary + other.imaginary;
        return new Complex(realPart, imaginaryPart);
    }

    // 复数减法
    public Complex subtract(Complex other) {
        double realPart = this.real - other.real;
        double imaginaryPart = this.imaginary - other.imaginary;
        return new Complex(realPart, imaginaryPart);
    }

    // 复数乘法
    public Complex multiply(Complex other) {
        double realPart = this.real * other.real - this.imaginary * other.imaginary;
        double imaginaryPart = this.real * other.imaginary + this.imaginary * other.real;
        return new Complex(realPart, imaginaryPart);
    }

    // 复数除法
    public Complex divide(Complex other) {
        double denominator = other.real * other.real + other.imaginary * other.imaginary;
        double realPart = (this.real * other.real + this.imaginary * other.imaginary) / denominator;
        double imaginaryPart = (this.imaginary * other.real - this.real * other.imaginary) / denominator;
        return new Complex(realPart, imaginaryPart);
    }

    // 复数转字符串
    public String toString() {
        if (imaginary == 0) {
            return Double.toString(real);
        } else if (real == 0) {
            return Double.toString(imaginary) + "i";
        } else {
            return Double.toString(real) + (imaginary > 0 ? "+" : "-") + Double.toString(Math.abs(imaginary)) + "i";
        }
    }
}

使用方法如下：

Complex a = new Complex(1, 2);
Complex b = new Complex(3, 4);

Complex c = a.add(b);
System.out.println(a + " + " + b + " = " + c);

Complex d = a.subtract(b);
System.out.println(a + " - " + b + " = " + d);

Complex e = a.multiply(b);
System.out.println(a + " * " + b + " = " + e);

Complex f = a.divide(b);
System.out.println(a + " / " + b + " = " + f);

运行结果如下：

1.0+2.0i + 3.0+4.0i = 4.0+6.0i
1.0+2.0i - 3.0+4.0i = -2.0-2.0i
1.0+2.0i * 3.0+4.0i = -5.0+10.0i
1.0+2.0i / 3.0+4.0i = 0.44+0.08i