using System;

using System.Collections.Generic;

using System.Linq;

​

public class Person

{

    public string Name {get; set;}

    public int Age {get; set;}

}

public class Program

{

    public static void ClearOutput()

    {

        for (var i=0; i < 100; i++)

        {

            Console.WriteLine("");

        }

    }

​

    public static void Main()

    {

        //ClearOutput();

        Question1();

        //Question2();

        //var q3 = new List<string> {"ab cd ef", "    abcde    ", "abcdefg"}; 

        //Console.WriteLine("Question 3: Original List");

        //foreach(var a in q3)

        //{

        //  Console.WriteLine(a);

        //}

        //Console.WriteLine("Question 3: Sorted List");

        //var q3answer = Question3(q3);

        //foreach(var a in q3answer)

        //{

        //  Console.WriteLine(a);

        //}

    }

    //Question 1: Understanding property values

    public static void Question1()

    {

        var q1 = new Person { Name = "Ryan", Age = 21 };

        var q1a = 21;

        AddTenToAge(q1);

        AddTen(q1a);

        Console.WriteLine(q1.Age);

        Console.WriteLine(q1a);

    }

    public static int AddTen(int a)

    {

        return a + 10;

    }

    public static void AddTenToAge(Person a)

    {

        a.Age += 10;

    }

    //Question 2: LINQ

    public static void Question2()

    {

        var numbers = new List<int> {1, 2, 3, 4};

        var a1 = numbers.Where(x => x == 2);

        foreach (var a in a1)

        {

            Console.WriteLine(a);

        }

        var a2 = numbers.Select(x => x == 2);

        foreach (var a in a2)

        {

            Console.WriteLine(a);

        }

    }

    //Question 3: Problem Solving

    // OBJECTIVE: Given a list of strings, return that same list of strings, sorted by length, EXCLUDING whitespace.

    public static List<string> Question3(List<string> x)

    {

        return null;

    }

​

    //Question 4: Problem Solving

    // OBJECTIVE: You own a cookie business. You charge a specific amount per cookie, but give a 25% discount on every dozen purchased. Calculate the total cost of an order of cookies.

    public static List<string> Question3(int cookieCount, double cookiePrice)

    {

        return null;

    }

}