1、设计一个日期类，其中含 以下方法，a、已知从1980年1月1日以来的天数，求该天的年月日；b、在某天比如 10月22日后的多少天比如 1000天应该是哪个年月日；
2、设计一个复数类，含两个复数的加、减、乘、除方法，以及复数与实数的加、减、乘、除方法。
我刚学，这是老师出的题目，我了解一下前辈是怎么想的

第一道挺容易的，直接定义三个变量，年月日，把天数除以365的整除部分赋值给年，余数除以12，整除部分赋给月，再除以30，整除部分赋给日，这样就行啦！第二道还不清楚复数是啥？好久没看数学~还有什么问题，QQ聊392989505

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Test_Complex
{
    // 自定义复数类
    public class Complex
    {
        private Double _real;           // 实部
        private Double _imaginary;      // 虚部

        // 构造函数
        public Complex(Double real, Double imaginary)
        {
            _real = real;
            _imaginary = imaginary;
        }

        // 模
        public Double Size()
        {
            return Math.Sqrt(_real * _real + _imaginary * _imaginary);
        }

        // 定义加法运算
        public static Complex operator +(Complex c1, Complex c2)
        {
            return new Complex(c1._real + c2._real, c1._imaginary + c2._imaginary);
        }

        // 定义减法运算
        public static Complex operator -(Complex c1, Complex c2)
        {
            return new Complex(c1._real - c2._real, c1._imaginary - c2._imaginary);
        }

        // 定义乘法运算
        public static Complex operator *(Complex c1, Complex c2)
        {
            Double x = c1._real * c2._real - c1._imaginary * c2._imaginary;
            Double y = c1._real * c2._imaginary + c2._real * c1._imaginary;
            return new Complex(x, y);
        }

        // 定义除法运算
        public static Complex operator /(Complex c1, Complex c2)
        {
            Double x = 0;
            Double y = 0;
            if (c2.Size() != 0)
            {
                x = (c1._real * c2._real + c1._imaginary * c2._imaginary) / (c2._real * c2._real + c2._imaginary * c2._imaginary);
                y = (c2._real * c1._imaginary - c1._real * c2._imaginary) / (c2._real * c2._real + c2._imaginary * c2._imaginary);
            }
            return new Complex(x, y);
        }

        public override String ToString()
        {
            return String.Format("({0:N})+i({1:N})", _real, _imaginary);
        }
    };

    class Program
    {
        static void Main(String[] args)
        {
            Complex c1 = new Complex(1, 0);
            Complex c2 = new Complex(0, 1);
            Console.WriteLine("c1 = {0}", c1);
            Console.WriteLine("c2 = {0}", c2);
            Console.WriteLine("c1 + c2 = {0}", c1 + c2);
            Console.WriteLine("c1 - c2 = {0}", c1 - c2);
            Console.WriteLine("c1 * c2 = {0}", c1 * c2);
            Console.WriteLine("c1 / c2 = {0}", c1 / c2);
            Console.ReadLine();
        }
    }
}

谢谢

谢谢版主，确实弄懂了一些问题

剩下实数和复数的运算，以及个别的完善，你自己会做了吧？

如果除12好像就有问题了