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

namespace ConsoleApp10
{
    class CPoint
    {
        public int x;
        public int y;
        string name;
        public CPoint(int x, int y, string name) : this(x, y)
        {
            Name = name;
        }
        public CPoint(int x, int y) : this()
        {
            Set(x, y);
        }
        public CPoint()
        {
            Set(x, y);
            Name = "Unknown";
        }
        public void Set(int x, int y)
        {
            X = x;
            Y = y;
        }
        public override bool Equals(object obj)
        {
            if (obj == null) return false;
            CPoint a = obj as CPoint;
            if (a == null) return false;
            return (a.X == X && a.Y == Y);
        }
        public static bool operator ==(CPoint a, CPoint b)
        {
            return a.Equals(b);
        }
        public static bool operator !=(CPoint a, CPoint b)
        {
            return !a.Equals(b);
        }
        public int X
        {
            get { return x; }
            set { x = value; }
        }
        public int Y
        {
            get { return y; }
            set { y = value; }
        }

        public string Name
        {
            get { return name; }
            set { name = value; }
        }
    }
    class CcoloredPoint : CPoint
    {
        string colorOfPoint;
        public CcoloredPoint(int x, int y, string name, string colorOfPoint) : base(x, y, name)
        {
            ColorOfPoint = colorOfPoint;
        }
        public CcoloredPoint(int x, int y) : this()
        {
            Set(x, y);
        }
        public CcoloredPoint() : base()
        {
            colorOfPoint = "black";
        }

        public string ColorOfPoint
        {
            get { return colorOfPoint; }
            set { colorOfPoint = value; }
        }

    }

    class CLine
    {
        CPoint a;
        CPoint b;
        string name;
        public CLine(CPoint a, CPoint b, string name) : this(a, b)
        {
            Name = name;
        }
        public CLine(CPoint a, CPoint b) : this()
        {
            Set(a, b);
        }
        public CLine()
        {
            Set(new CPoint(0, 0), new CPoint(0, 1));
            Name = "Unknown";
        }
        public void Set(CPoint a, CPoint b)
        {
            A = a;
            B = b;
        }
        public static bool IsParallel(CLine a, CLine b)
        {
            if (a.Gradient() * b.Gradient() == 1)
                return true;
            else return false;
        }
        public static bool IsPerpendicular(CLine a, CLine b)
        {
            if (a.Gradient() == b.Gradient())
                return true;
            else return false;
        }
        /*public override bool Equals(object obj)
        {
            if (obj == null) return false;
            CLine m = obj as CLine;
            if (m == null) return false;
            float m1 = (float)(A.Y - a.Gradient() * A.X);
            float m2 = (float)(.y - b.Gradient() * b.x);
            return (k1 == k2);
        }*/
        /*    public static bool Match(CLine a, CLine b)
        {
            if (a.Gradient() == b.Gradient())
            {
                if (A.Y - a.Gradient()*a.x == b.y - b.Gradient() * b.x)
                {
                    return true;
                }
            }
            return false;
        }*/
        /*if (k1 == k2) {
              (они параллельны);
              if (y1 - k1x1 ==y2 - k2x2 ){
                     (совпадают );
                                      }
                }                    */
        public override bool Equals(object obj)
        {
            if (obj == null) return false;
            CLine m = obj as CLine;
            if (m == null) return false;
            float m1 = (float)(A.Y - .Gradient() * A.X);
            float m2 = (float)(A.Y - a.Gradient() * A.X);
            return (m1 == m2);
        }
        public static bool operator ==(CLine a, CLine b)
        {
            return a.Equals(b);
        }
        public static bool operator !=(CLine a, CLine b)
        {
            return !a.Equals(b);
        }
        public CPoint A
        {
            get { return a; }
            set { a = value; }
        }
        public CPoint B
        {
            get { return b; }
            set { b = value; }
        }
        public string Name
        {
            get { return name; }
            set { name = value; }
        }
        public float Gradient()
        {
            return (float)(B.X - A.X) / (B.Y - A.Y);
        }
    }
    class CcoloredLine : CLine
    {
        string colorOfLine;
        public CcoloredLine(CPoint a, CPoint b, string name, string colorOfLine) : base(a, b, name)
        {
            ColorOfLine = colorOfLine;
        }
        public CcoloredLine(CPoint a, CPoint b) : this()
        {
            A = a;
            B = b;
        }
        public CcoloredLine() : base()
        {
            ColorOfLine = "black";
        }
        public string ColorOfLine
        {
            get { return colorOfLine; }
            set { colorOfLine = value; }
        }

    }

    class Program
    {
        static void Main(string[] args)
        {
        }
    }
}