using System.Numerics;
using System.Runtime.Intrinsics;

namespace Lesson10_封装_运算符重载
{
    //class Vector
    //{
    //    public int x; 
    //    public int y;
    //    public Vector(int x,int y)
    //    {
    //        this.x = x;
    //        this.y = y;
    //    }
    //    public static bool operator ==(Vector a, Vector b)
    //    {
    //        if (a.x == b.x && a.y == b.y)
    //        {
    //            return true;
    //        }
    //        else
    //        {
    //            return false;
    //        }
    //    }
    //    public static bool operator !=(Vector a, Vector b)
    //    {
    //        if (a.x != b.x && a.y != b.y)
    //        {
    //            return true;
    //        }
    //        else
    //        {
    //            return false;
    //        }
    //    }
    //}
    struct Position
    {
        int x;
        int y;

        public Position(int x,int y)
        {
            this.x = x;
            this.y = y;
        }
        public static bool operator ==(Position a, Position b)
        {
            if (a.x == b.x && a.y == b.y)
            {
                return true;
            }
            else
            {
                return false;
            }
        }
        public static bool operator !=(Position a, Position b)
        {
            if (a.x != b.x && a.y != b.y)
            {
                return true;
            }
            else
            {
                return false;
            }
        }
    }
    class Vector3
    {
        public int x,y,z;
        public Vector3()
        {
            x = 0;
            y = 0;
            z = 0;
        }
        public Vector3(int x,int y,int z)
        {
            this.x = x;
            this.y = y;
            this.z = z;
        }
        public static Vector3 operator +(Vector3 a,Vector3 b)
        {
            Vector3 vector = new Vector3();
            vector.x = a.x + b.x;
            vector.y = a.y + b.y;
            vector.z = a.z + b.z;
            return vector;
        }
        public static Vector3 operator -(Vector3 a, Vector3 b)//一步到位写法
        {
            return new Vector3(a.x-b.x,a.y-b.y,a.z-b.z);
        }
        public static Vector3 operator *(Vector3 a, int b)
        {
            Vector3 vector = new Vector3();
            vector.x = a.x * b;
            vector.y = a.y * b;
            vector.z = a.z * b;
            return vector;
        }
    }
    internal class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello, World!");
            Position p1 = new Position(1, 2);
            Position p2 = new Position(1, 2);
            Console.WriteLine(p1 == p2);
            Console.WriteLine(p1 != p2);
            Vector3 v1 = new Vector3(2,2,2);
            Vector3 v2 = new Vector3(1,1,1);
            Vector3 v3 = v1 + v2;
            Vector3 v4 = v1 - v2;
            Vector3 v5 = v1 * 2;
            Console.WriteLine(v3.x);
            Console.WriteLine(v4.x);
            Console.WriteLine(v5.x);
        }
    }
}