using System;

public class Program

{

    public static void Main()

    {

        Vector v1 = new Vector(2);

        Vector v2 = new Vector(2);

​

        float dotProduct = v1 * v2;

        Vector scaledVector = 5 * v1;

        Console.WriteLine("Done");

    }

    public class Vector

    {

        public int dimension;

        public float[] coord;

​

        public Vector(int d)

        {

            this.dimension = d;

            coord = new float[] { 0, 0};

        }

​

        public static Vector operator *(float scalar, Vector v)

        {

            Vector result = new Vector(v.dimension);

​

            for (int i = 0; i < v.dimension; i++)

            {

                result.coord[i] = scalar * v.coord[i];

            }

​

            return result;

        }

​

        public static float operator *(Vector v1, Vector v2)

        {

            if (v1.dimension != v2.dimension)

            {

                throw new ArgumentException("Vectors need to have the same dimension");

            }

​

            float result = 0;

​

            for (int i = 0; i < v1.dimension; i++)

            {

                result += v1.coord[i] * v2.coord[i];

            }

​

            return result;

        }

    }

}