2016HelloWorld3a

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

namespace HelloWorld3a
{
    class Program
    {
        static void Main(string[] args)
        {
            /*
            Console.WriteLine("Hello world аояьяоао!");
            Console.Beep(500, 1000);

            byte age = 53;
            decimal money;
            char firstLetter = 'S';
            string name = "Stoyan";
            bool isMale = true;

            money = 2.54m;

            firstLetter = 'T';

            Console.WriteLine("I am {0} years old.", age);
            Console.WriteLine("I have {0} money!", money);
            Console.WriteLine("I am {1} years old!. The first letter of my name is {0}. ", firstLetter, age);
            Console.WriteLine("My name is {0}", name);
            Console.WriteLine("Am I a man?{0}", isMale);

            byte a = 13;
            byte b = 5;
            // 1.
            Console.WriteLine("{0} + {1} = {2}",a, b, a + b);
            Console.WriteLine("{0} - {1} = {2}", a, b, a - b);
            Console.WriteLine("{0} * {1} = {2}", a, b, a * b);
            Console.WriteLine("{0} / {1} = {2}", a, b, a / b);
            Console.WriteLine("{0} % {1} = {2}", a, b, a % b);
            Console.WriteLine("++{0}  = {1}", a, ++a);

            // 2. comparison
            Console.WriteLine("{0} < {1} = {2}", a, b, a < b);
            Console.WriteLine("{0} > {1} = {2}", a, b, a > b);
            Console.WriteLine("{0} <= {1} = {2}", a, b, a <= b);
            Console.WriteLine("{0} >= {1} = {2}", a, b, a >= b);
            Console.WriteLine("{0} == {1} = {2}", a, b, a == b);
            Console.WriteLine("{0} == {1} = {2}", a, b, a != b);

            // 3. Boolean
            bool c = true;
            bool d = false;

            Console.WriteLine("{0} && {1} = {2}", c, d, c && d);
            Console.WriteLine("{0} || {1} = {2}", c, d, c || d);
            Console.WriteLine("{0} ^ {1} = {2}", c, d, c ^ d);
            Console.WriteLine("!{0} = {1}", c, !c);

            // kdjsfhsdkfjh askjfsdk fdkjh fksjh fkjsd
            // a = 5; // a = a + 5;

            Console.WriteLine("{0} << 1 {1}", 1, 1 << 1);
            Console.WriteLine("{0} >> 1 {1}", 1, 1 >> 1);
            Console.WriteLine("{0} | {1} = {2}", a, b, a | b);
            Console.WriteLine("{0} & {1} = {2}", a, b, a & b);
            Console.WriteLine("{0} ^ {1} = {2}", a, b, a ^ b);
            Console.WriteLine("~{0} = {1}", a, ~a);

            Console.WriteLine("Please, enter your age:");
            string input = Console.ReadLine();
            byte newAge = byte.Parse(input);

            Console.WriteLine("In 10 years you will be {0}", input + 10);

            if( newAge <= 18 )
            {
                Console.WriteLine("You are a teenager!!!");
            }
            else if (newAge > 18 && newAge <= 30)
            {
                Console.WriteLine("You are in a golden age!");
            }
            else
            {
                Console.WriteLine("You are an adult!");
            }

            switch (newAge)
            {
                case 22 :
                case 23 :
                    Console.WriteLine("You are 23 years old. You are very sick person!");
                    break;
                default :
                    Console.WriteLine("I don't know what to say!");
                    break;
            }
            */
            //Console.WriteLine(1);
            //Console.WriteLine(2);
            //Console.WriteLine(3);

            int i = 1;
            while (i <= 10)
            {
                if (i == 5) break;
                Console.WriteLine(i);
                i++;
            }

            i = 11;
            do
            {
                Console.WriteLine("do-while: {0}", i);
                i++;
            } while (i <= 10);

            /*
            string choice = "0";
            do
            {
                Console.Clear();
                Console.WriteLine("Моля изберете номер на рецепта:");
                Console.WriteLine("1. Пържени яйца");
                Console.WriteLine("2. Пиле с ориз");
                Console.WriteLine("3. фасул");
                Console.WriteLine("4. Изход от програмата");

                choice = Console.ReadLine();
                if (choice == "4") break;

                if (choice == "1")
                {
                    Console.Clear();
                    Console.WriteLine("За да се върнеш в основното меню натисни кой да е клавиш и после Enter");
                    Console.WriteLine("За да си опържеш яйца...");
                    Console.ReadLine();
                }

            }while(true);
            */


            for (i = 0; i < 10; i++)
            {
                if (i % 2 != 0) continue;
                // if (i % 2 == 0)
                //{
                Console.WriteLine("for even {0}", i);
                //}
            }

            string[] studentNames = { "Robeta", "Mirela", "Nikola",
                                        "Adrian", "Mitko", "Milen", "Sabrin",
                                        "Valentin", "Ivan", "Stafan", "Nora",
                                        "Dani", "Konstantin", "Silvestar", "Mirela"};

            foreach (string name in studentNames)
            {
                Console.WriteLine(name);
            }

            int[] myArray;
            myArray = new int[5];
            myArray[4] = 45;

            // 2.
            // int[] myArray = new int[5];


            // 3.
            // int[] myArray = {0, 0, 0, 0, 45}

            for (i = 0; i < myArray.Length; i++)
            {
                Console.WriteLine("myArray[{0}] = {1}", i, myArray[i]);
            }


            //string[,] positionsOfTheStudents;
            //positionsOfTheStudents = new string[3, 8];
            //positionsOfTheStudents[0, 0] = "Roberta";

            string[,] positionsOfTheStudents = {
                   {"Roberta", "Mirela","Nikola","","","Adrian", "","Mitko"},
                   {"Milen", "Sabrin","","","Ivan","", "","Stafan"},
                   {"Nora", "Dani","","Konstantin","Silvestar","", "","Mirela"}
            };

            for (i = 0; i < positionsOfTheStudents.GetLength(0); i++)
            {
                for (int j = 0; j < positionsOfTheStudents.GetLength(1); j++)
                {
                    Console.WriteLine("positionsOfTheStudents[{0},{1}] = {2}", i, j, positionsOfTheStudents[i,j]);
                }
            }

            int[][] jaggedArray;
            jaggedArray = new int[2][];
            jaggedArray[0] = new int[8];
            jaggedArray[1] = new int[5];

            byte result = 148;

            Console.WriteLine(Convert.ToString(result, 2).PadLeft(16, '0'));
            /*
            for (i = 0; i < 10; i++)
            {
                Console.Write('*');
            }
            Console.WriteLine();
            for (i = 0; i < 20; i++)
            {
                Console.Write('^');
            }

            */

            Console.WriteLine(createString(20));
            Console.WriteLine(createString(10, '^'));

            Console.WriteLine("factorial(3) = {0}", factorial(3));
            Console.WriteLine("factorial(3) = {0}", factorialIteration(3));

        }

        static string createString(int n, char c = '*')
        {
            string temp = "";
            for (int i = 0; i < n; i++)
            {
                temp += c;
            }
            return temp;
        }

        static int factorial(int n)
        {
            if (n == 0) return 1;
            return factorial(n - 1) * n;
        }

        static int factorialIteration(int n)
        {
            if (n == 0) return 1;
            int temp = 1;
            for (int i = 1; i <= n; i++)
            {
                temp *= i; // temp = temp * i;
            }
            return temp;
        }

    }
}