using System;

using System.Net.Http;

using System.Text.Json;

using System.Threading;

​

​

namespace Modulprüfung

{

    class Program

    {

​

        static void Main(string[] args)

        {

            var arrUsers = new Users[]

                {

                new Users("¨Steven", "Gschwind", 2003),

                };

​

            Start:

                Console.ForegroundColor = ConsoleColor.DarkBlue;

                Console.WriteLine("\tzum einloggen 1 zum registrieren 2\n\t");

                Console.ForegroundColor = ConsoleColor.Cyan;

                var input = Console.ReadLine();

​

​

                bool successfull = false;

                while (!successfull)

                {

​

                    if (input == "1")

                    {

                        Console.Clear();

                        Console.ForegroundColor = ConsoleColor.DarkBlue;

                        Console.WriteLine("Write your username:");

                        Console.ForegroundColor = ConsoleColor.Cyan;

                        var username = Console.ReadLine();

                        Console.ForegroundColor = ConsoleColor.DarkBlue;

                        Console.WriteLine("Enter your password:");

                        Console.ForegroundColor = ConsoleColor.Cyan;

                        var password = Console.ReadLine();

​

                        foreach (Users user in arrUsers)

                        {

                            if (username == user.username && password == user.password)

                            {

                                Console.ForegroundColor = ConsoleColor.DarkGreen;

                                Console.WriteLine("Hello "+ username + "\nYou have successfully logged in !!!");

                                Console.ReadLine();

                                Console.Clear();

                                successfull = true;

​

                                while(true){

                                    Console.Clear();

                                    int zahl = 0;

                                    string txt;

                                    Console.ForegroundColor = ConsoleColor.Blue;

                                    Console.Write("Welcome " + user.username + " ");

                                    Console.Write("Geben sie ihre zahl ein " + "\n\t\t1= Umfang Calculator " + "\n\t\t2= Flächen Calculator " + "\n\t\t3= Volume Calculator " + "\n\t\t4= Exit" + "\n\t> ");

                                    Console.ForegroundColor = ConsoleColor.Cyan;

                                    txt = Console.ReadLine();

                                    zahl = Convert.ToInt32(txt);

                                    switch (zahl)

                                    {

​

                                        case 1:

                                        Console.Clear();

                                        Console.ForegroundColor = ConsoleColor.Blue;

                                        Console.WriteLine("\tUmfang Calculator");//dies berechnet Umfang

                                        {

                                            Console.WriteLine("Gebe die Zahl ein: ");

                                            int a = Convert.ToInt32(Console.ReadLine());

                                            Console.WriteLine("" + 2 + "*" + a + "*" + Math.PI + "=" + (2 * a * Math.PI));

                                            Console.ReadKey();

                                        }

                                        break;

​

                                        case 2:

                                        Console.Clear();

                                        Console.ForegroundColor = ConsoleColor.Blue;

                                        Console.WriteLine("\tFlächen Calculator");//dies berechnet Flächen

                                        {

                                            Console.WriteLine("Gebe die Zahl ein: ");

                                            int a = Convert.ToInt32(Console.ReadLine());

                                            Console.WriteLine("" + a + "^" + 2 + "*" + Math.PI + "=" + (Math.Pow(a, 2) * Math.PI));

                                            Console.ReadKey();

                                        }

                                        break;

​

                                        case 3:

                                        Console.Clear();

                                        Console.ForegroundColor = ConsoleColor.Blue;

                                        Console.WriteLine("\tVolume Calculator");//dies berechnet Volumen

                                        {

                                            Console.WriteLine("Geben sie die zahl ein für die Fläche:");

                                            int a = Convert.ToInt32(Console.ReadLine());

                                            Console.WriteLine("Geben sie die höhe ein: ");

                                            int b = Convert.ToInt32(Console.ReadLine());

                                            Console.WriteLine("" + a + "^" + 2 + "*" + Math.PI + "*" + b + "=" + (Math.Pow(a, 2) * Math.PI) * b);

                                            Console.ReadKey();

                                        }

                                        break;

                                        case 4:

                                        Console.Clear();

                                        Console.ForegroundColor = ConsoleColor.Blue;

                                        Console.WriteLine("\tExit");//dies geht aus dieser aplication raus

                                        {

                                            Console.ForegroundColor = ConsoleColor.DarkRed;

                                            Console.WriteLine("Do you want to exit? \n\ty/n");

                                            Console.ForegroundColor = ConsoleColor.Cyan;

                                            input = Console.ReadLine().ToLower();

                                            if (input == "y" || input == "yes")

                                            {

                                                return;

                                            }

                                            else if (input == "n" || input == "no")

                                            {

                                            }

​

                                        }

                                        break;

                                }

                                    }

                            }

                        }

​

​

                        if (!successfull)

                        {

                        Console.ForegroundColor = ConsoleColor.DarkRed;

                        Console.WriteLine("Your username or password is incorect, try again !!!");

                        }

​

                    }

​

                    else if (input == "2")

                    {

                        Console.ForegroundColor = ConsoleColor.DarkBlue;

                        Console.WriteLine("Enter your username:");

                        Console.ForegroundColor = ConsoleColor.Cyan;

                        var username = Console.ReadLine();

​

                        Console.ForegroundColor = ConsoleColor.DarkBlue;

                        Console.WriteLine("Enter your password:");

                        Console.ForegroundColor = ConsoleColor.Cyan;

                        var password = Console.ReadLine();

​

                        Console.ForegroundColor = ConsoleColor.DarkBlue;

                        Console.WriteLine("Enter your id:");

                        Console.ForegroundColor = ConsoleColor.Cyan;

                        int id = int.Parse(Console.ReadLine());

​

​

                        Array.Resize(ref arrUsers, arrUsers.Length + 1);

                        arrUsers[arrUsers.Length - 1] = new Users(username, password, id);

                        successfull = true;

                        goto Start;

​

                    }

                    else

                    {

                        Console.ForegroundColor = ConsoleColor.DarkRed;

                        Console.WriteLine("Please try again !!!");

                        break;

​

​

                    }

​

                }

​

        }

    }

}

​

    public class Users

    {

        public string username;

        public string password;

​

        public Users(string username, string password, int id)

        {

            this.username = username;

            this.password = password;

        }

    }