c# - 在 C# 中创建复数类

Question

我尝试使用两个不同的构造函数在 C# 中创建复数类，第一个构造函数采用实部和虚部，第二个构造函数采用模块和参数。

public class Complex
{
    public Complex() { }

    private Complex(double _re, double _im)
    {
        re = _re;
        im = _im;
    }

    public static double Complex_FromCartesian(double _re, double _im)
    {
        return new Complex(_re, _im);
    }

    public static double Complex_FromPolar(double _mod, double _arg)
    {
        var _re = _mod * Math.Cos(_arg);
        var _im = _mod * Math.Sin(_arg);
        return new Complex(_re, _im);
    }

    public static Complex operator +(Complex num1, Complex num2)
    {
        return new Complex(num1.re + num2.re, num2.im + num2.im);
    }

    public static Complex operator -(Complex num1, Complex num2)
    {
        return new Complex(num1.re - num2.re, num2.im - num2.im);
    }

    public double Re { get; set; }
    public double Im { get; set; }

    private double re, im;
}

但是我在两个构造函数中都遇到了同样的错误

如何解决？

Answer 1

您的方法返回一个 double 但您试图返回一个 Complex 类型

改变:

public static double Complex_FromCartesian(double _re, double _im)
{
    return new Complex(_re, _im);
}

收件人:

public static Complex Complex_FromCartesian(double _re, double _im)
{
    return new Complex(_re, _im);
}