using System;

namespace ProgrammingAssignment1
{
    class Program
    {
        static void Main(string[] args)
        {
            // welcome message
            Console.WriteLine("Welcome. This program will calculate the distance between two points" +
                " and the angle between those two points.");

            // declare variables
            float point1x;
            float point1y;
            float point2x;
            float point2y;

            // get values from user
            Console.Write("First X Value: ");
            point1x = float.Parse(Console.ReadLine());
            Console.Write("First Y Value: ");
            point1y = float.Parse(Console.ReadLine());
            Console.Write("Second X Value: ");
            point2x = float.Parse(Console.ReadLine());
            Console.Write("Second Y Value: ");
            point2y = float.Parse(Console.ReadLine());

            // calculate delta x
            float deltax;
            float deltay;
            deltax = point2x - point1x;
            deltay = point2y - point1y;

            // display delta
            Console.WriteLine("Delta X: " + deltax);
            Console.WriteLine("Delta Y: " + deltay);

            // calculate distance between points
            double deltax2;
            double deltay2;
            double distance;
            double distsqrt;
            deltax2 = Math.Pow(deltax, deltax);
            deltay2 = Math.Pow(deltay, deltay);
            distsqrt = (deltax2 + deltay2);
            distance = Math.Sqrt(distsqrt);

            // display distance
            Console.WriteLine("Dx^2: " + deltax2);
            Console.WriteLine("Dy^2: " + deltay2);
            Console.WriteLine("DistSqrt: " + distsqrt);
            Console.WriteLine("Distance: " + (float)distance);

            // calculate angle
            double angle;
            angle = Math.Atan2(point1y, point1x);

            // display angle
            Console.WriteLine("Angle: " + angle);


        }
    }
}