using System;

namespace ConsoleApp1
{
    class Program
    {
        static Equation3 eq3 = new Equation3();
        static Equation2 e = new Equation2();
        public static double force;
        public static double distance;
        public static double workdone;

        public static void RunEquation1()
        {
            Equation1 eq = new Equation1();
            Console.WriteLine("Work done = force x distance");
            Console.WriteLine("Which would you like to find out");
            Console.WriteLine("1) Work done");
            Console.WriteLine("2) Force");
            Console.WriteLine("3) Distance");
            int input = Convert.ToInt32(Console.ReadLine());

            switch (input)
            {
                case 1:
                    Workdone();
                    eq.Workdone(force, distance);
                    break;
                case 2:
                    Force();
                    eq.Force(workdone, distance);
                    break;
                case 3:
                    Distance();
                    eq.Distance(workdone, force);
                    break;
            }


        }
        static void Main(string[] args)
        {
            int i = 0;
            while (i == 0) {
                Console.WriteLine("Which equation would you like to use");
                Console.WriteLine("1) Force = Mass x Acceleration");
                Console.WriteLine("2) Work done = Force x distance");
                Console.WriteLine("3) Moment = Force x Distance");
                int ans = Convert.ToInt32(Console.ReadLine());
                switch (ans)
                {
                    case 1:
                        RunEquation1();
                        break;
                    case 2:
                        e.RunEquation2();
                        break;
                    case 3:
                        eq3.RunEquation3();
                        break;


                }
                Console.WriteLine();
            }
            Console.ReadKey();
        }

        public static void Workdone()
        {

            Console.WriteLine("Enter Force (N)");
            force = Convert.ToDouble(Console.ReadLine());
            Console.WriteLine("Enter Distance (m)");
            distance = Convert.ToDouble(Console.ReadLine());

        }

        public static void Force()
        {

            Console.WriteLine("Enter Workdone (J)");
            workdone = Convert.ToDouble(Console.ReadLine());
            Console.WriteLine("Enter Distance (m)");
            distance = Convert.ToDouble(Console.ReadLine());

        }
        public static void Distance()
        {

            Console.WriteLine("Enter Workdone (J) ");
            workdone = Convert.ToDouble(Console.ReadLine());
            Console.WriteLine("Enter Force (N)");
            force = Convert.ToDouble(Console.ReadLine());

        }


    }
    public class Equation1
    {
        public void Workdone(double f, double d)
        {
            double w = f * d;
            Console.WriteLine("Work done = {0}J",w);
        }
        public void Distance(double wd, double f)
        {
            double d = wd/f;
            Console.WriteLine("Distance = {0}m",d);
        }
        public void Force(double wd, double d)
        {
            double f = wd / d;
            Console.WriteLine("Force = {0}N",f);
        }

    }





}

using System;



namespace ConsoleApp1
{
    public class Equation2
    {

        public static double Forces;
        public static double mass;
        public static double acceleration;

        public void RunEquation2()
        {
            Console.WriteLine("force = mass x acceleration");
            Console.WriteLine("Which would you like to find out");
            Console.WriteLine("1) Force");
            Console.WriteLine("2) Mass");
            Console.WriteLine("3) Acceleration");
            int num = Convert.ToInt32(Console.ReadLine());

            switch (num)
            {
                case 1:
                    Force();
                    force(mass, acceleration);
                    break;
                case 2:
                    Mass();
                    Mass(Forces, acceleration);
                    break;
                case 3:
                    Acceleration();
                    Acceleration(Forces, mass);
                    break;
            }

        }

        public static void Force()
        {

            Console.WriteLine("Enter Mass (kg)");
            mass = Convert.ToDouble(Console.ReadLine());
            Console.WriteLine("Enter Acceleration (m/s^2)");
            acceleration = Convert.ToDouble(Console.ReadLine());

        }
        public static void Mass()
        {

            Console.WriteLine("Enter Force (N)");
            Forces = Convert.ToDouble(Console.ReadLine());
            Console.WriteLine("Enter Acceleration (m/s^2)");
            acceleration = Convert.ToDouble(Console.ReadLine());

        }
        public static void Acceleration()
        {

            Console.WriteLine("Enter Force (N)");
            Forces = Convert.ToDouble(Console.ReadLine());
            Console.WriteLine("Enter Mass (kg)");
            mass = Convert.ToDouble(Console.ReadLine());

        }

        public void force(double m, double a)
        {
            double f = m * a;
            Console.WriteLine("Force = {0}N", f);
        }

        public void Mass(double f, double a)
        {
            double m = f / a;
            Console.WriteLine("Mass = {0}kg", m);
        }

        public void Acceleration(double f, double m)
        {
            double a = f / m;
            Console.WriteLine("Acceleration = {0}m/s^2", a);
        }




    }
}

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

namespace ConsoleApp1
{
    class Equation3
    {
        public static double moment;
        public static double force;
        public static double distance;

        public void RunEquation3()
        {
            Console.WriteLine("Moment = force x distance");
            Console.WriteLine("Which would you like to find out");
            Console.WriteLine("1) Moment");
            Console.WriteLine("2) Force");
            Console.WriteLine("3) Distance from the pivot perpendicular to the line of action");
            int numb = Int32.Parse(Console.ReadLine());

            switch (numb)
            {
                case 1:
                    Moment();
                    Moment(force, distance);
                    break;
                case 2:
                    Force();
                    Forces(moment, distance);
                    break;
                case 3:
                    Distance();
                    Distance(moment, force);
                    break;
            }

        }

        public static void Moment()
        {

            Console.WriteLine("Enter Force (N)");
            force = Convert.ToDouble(Console.ReadLine());
            Console.WriteLine("Enter Distance (m)");
            distance = Convert.ToDouble(Console.ReadLine());

        }
        public static void Force()
        {

            Console.WriteLine("Enter Moment (Nm)");
            moment = Convert.ToDouble(Console.ReadLine());
            Console.WriteLine("Enter Distance(m)");
            distance = Convert.ToDouble(Console.ReadLine());

        }
        public static void Distance()
        {

            Console.WriteLine("Enter Moment (Nm)");
            moment = Convert.ToDouble(Console.ReadLine());
            Console.WriteLine("Enter Force (N)");
            force = Convert.ToDouble(Console.ReadLine());

        }

        public void Moment(double f, double d)
        {
            double m = f * d;
            Console.WriteLine("Moment = {0}Nm", m);
        }

        public void Forces(double m, double d)
        {
            double f = m / d;
            Console.WriteLine("Force = {0}N", f);
        }

        public void Distance(double m, double f)
        {
            double d = m / f;
            Console.WriteLine("Distance = {0}m", d);
        }







    }
}