using System;

public class Program

{

    public static void Main()

    {

        login();

    }

    static void login()

    {

        Console.WriteLine("**********************************************");

        Console.WriteLine("Welcome to Matthew's Student Management System");

        Console.WriteLine("**********************************************");

        string username, password;

        do

        {

            Console.WriteLine("Enter your username");

            username = Console.ReadLine();

​

            Console.WriteLine("Enter your password");

            password = Console.ReadLine();

        }

        while(username!="matthew" || password!="orchin");

        mainMenu();

    }

    static void mainMenu()

    {

        Console.WriteLine("**********************************************");

        Console.WriteLine("Welcome to Matthew's Student Management System");

        Console.WriteLine("**********************************************");

        Console.WriteLine("1. Add a student");

        Console.WriteLine("2. Add A Teacher");

        Console.WriteLine("3. Logout");

        int option = Convert.ToInt16(Console.ReadLine());

        switch(option)

        {

            case 1:

                addStudent();

                break;

            case 2:

                addTeacher();

                break;

            default:

                mainMenu();

                break;

        }

    }

    static void addStudent()

    {

        Console.WriteLine("**********************************************");

        Console.WriteLine("Welcome to Matthew's Student Management System");

        Console.WriteLine("**********************************************");

        Console.WriteLine("You are here: Add a Student");

        string firstName, surname, gender;

        int age;

        Console.WriteLine("Please enter your first name");

        firstName = Console.ReadLine();

        Console.WriteLine("Please enter your surname");

        surname = Console.ReadLine();

        Console.WriteLine("Please enter your gender");

        gender = Console.ReadLine();

        Console.WriteLine("Please enter your age");

        age = Convert.ToInt16(Console.ReadLine());

        Console.WriteLine("You entered the following details "); 

        Console.WriteLine("\nFirst Name:\t" + firstName);

        Console.WriteLine("\nSurname:\t" + surname);

        Console.WriteLine("\nGender:\t" + gender);

        Console.WriteLine("\nAge:\t" + age);

    }

    static void addTeacher()

    {

        Console.WriteLine("**********************************************");

        Console.WriteLine("Welcome to Matthew's Student Management System");

        Console.WriteLine("**********************************************");

        Console.WriteLine("You are here: Add a Teacher");

​

    }

}