自己动手写计算器v1.1

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

namespace 计算器
{
    //简述：用工厂模式取代了简单工厂模式，对比与简单工厂模式，工厂模式，将简单工厂类中的逻辑判断利用接口分离了开来。
    interface Result
    {
        OperatorV1_1 getOperatorV1_1();
    }
    class plusOperatorV1_1Factory:Result
    {
        public OperatorV1_1 getOperatorV1_1()
        {
            return new plusOperatorV1_1();
        }
    }
    class jianOperatorV1_1Factory:Result
    {
        public OperatorV1_1 getOperatorV1_1()
        {
            return new jianOperatorV1_1();
        }
    }
    class chenOperatorV1_1Factory:Result
    {
        public OperatorV1_1 getOperatorV1_1()
        {
            return new chenOperatorV1_1();
        }
    }
    class chuOperatorV1_1Factory:Result
    {
        public OperatorV1_1 getOperatorV1_1()
        {
            return new chenOperatorV1_1();
        }
    }
    class OperatorV1_1
    {
        public virtual string GetResult(double num1, double num2)
        {
            return "error";
        }
    }
    class plusOperatorV1_1 : OperatorV1_1
    {
        public override string GetResult(double num1, double num2)
        {
            return (num1 + num2).ToString();
        }
    }
    class jianOperatorV1_1 : OperatorV1_1
    {
        public override string GetResult(double num1, double num2)
        {
            return (num1 - num2).ToString();
        }
    }
    class chenOperatorV1_1 : OperatorV1_1
    {
        public override string GetResult(double num1, double num2)
        {
            return (num1 * num2).ToString();
        }
    }
    class chuOperatorV1_1 : OperatorV1_1
    {
        public override string GetResult(double num1, double num2)
        {
            if (num2 == 0)
            {
                return "除数不能为0";
            }
            else
            {
                return (num1 / num2).ToString();
            }
        }
    }
}