Vector.cs

namespace hashes
{
	public class Vector
	{
		public double X { get; private set; }
		public double Y { get; private set; }

		public Vector(double x, double y)
		{
			X = x;
			Y = y;
		}

		public Vector Add(Vector other)
		{
			X += other.X;
			Y += other.Y;
			return this;
		}

		protected bool Equals(Vector other)
		{
			return X.Equals(other.X) && Y.Equals(other.Y);
		}

		public override bool Equals(object obj)
		{
			if (ReferenceEquals(null, obj)) return false;
			if (ReferenceEquals(this, obj)) return true;
			if (obj.GetType() != this.GetType()) return false;
			return Equals((Vector) obj);
		}

		public override int GetHashCode()
		{
			unchecked
			{
				return (X.GetHashCode()*397) ^ Y.GetHashCode();
			}
		}
	}
}