2016HelloWorld2a

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

namespace HelloWorld2a
{
    class Program
    {
        static void Main(string[] args)
        {
            int first = 13;
            int second = 2;
            double result = (double)first / second;
            Console.WriteLine(result);

            Console.WriteLine("Hello World!");

            int age = 0;

            Console.WriteLine("Please enter your age?");
            string input = Console.ReadLine();

            try
            {
                age = int.Parse(input);
            }
            catch (System.FormatException e)
            {
                Console.WriteLine("Incorect data!!! {0}", e.Message);
                // throw new System.
            }
            finally
            {
                Console.WriteLine("I am always executed!");
            }


            if (age <= 20)
            {
                Console.WriteLine("You are a teenager!");
            }
            else if (age > 20 && age <= 30)
            {
                Console.WriteLine("You are in a perfect age");
            }
            else
            {
                Console.WriteLine("I don't know what to say");
            }

            switch (age)
            {

                case 23:
                    Console.WriteLine("You are 23 years old!");
                    break;

                case 43:
                case 34:
                    Console.WriteLine("Bad magic!");
                    break;
                default:
                    Console.WriteLine("I don't know!");
                    break;
            }




            Console.WriteLine("In 10 years you will be " + (age + 10));
            // long myLong = -3123213L;
            // byte, sbyte, short, ushort, int, uint, long, ulong

            double money = 2.54;
            float money1 = 3.45f;
            double sum1 = 2.1;
            double sum2 = 1.04;
            double sum = sum1 + sum2;

            double fix = 3.14;

            decimal myDec = 23.456m;

            char letter = 'S';// '\u000f';

            string name = "Zlatomira";

            bool _myVar = true; // false

            bool pr = (1 + 2) * 8 % 4 > 23 + 45 % 34;

            Console.WriteLine(sum == fix);

            Console.Beep(2130, 321);

            Console.WriteLine(age);

            Console.WriteLine(pr);

            age = age + 1; // ++age

            age += 1;

            Console.WriteLine(DateTime.Now);
            Console.WriteLine(age);


            Console.WriteLine(1);
            Console.WriteLine(2);
            Console.WriteLine(3);
            Console.WriteLine(4);

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

            do
            {
                Console.WriteLine("Please enter your age:");
                try
                {
                    input = Console.ReadLine();
                    age = byte.Parse(input);
                }
                catch (System.FormatException e)
                {
                    Console.WriteLine(e.Message);
                    age = -1;
                }

                if (age == 0) {
                    Console.WriteLine("You are too young for me. I don't want to deal with you!");
                    break;
                }

            } while (age < 0);

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

            Console.WriteLine("The correct age is {0}", age);

            for (i = 0; i <= 10; i++)
            {
                if (i % 2 == 1)
                {
                    continue;
                }

                if (i % 2 == 0)
                {
                    Console.WriteLine("for i = {0}", i);
                }
            }

            string[] names = { "Vasil", "Petko", "Mitko", "Rangel", "Yani", "Nelina", "Detelina"};

            foreach (string nameStudent in names)
            {
                if (nameStudent == "Mitko")
                {
                    Console.WriteLine("I found a student with name Mitko!");
                    break;
                }
                Console.WriteLine(nameStudent);
            }

            /* 1.
            int[] myArray;
            myArray = new int[7];
            myArray[6] = 45;

            */
            // 2.
            // int[] myArray = new int[7];

            // 3.
            int[] myArray = { 54, 65, 65, 76, 67, 76, 89};


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

            string[,] positionsOfTheStudents = {
                   {"", "","","","Vasko","Petko", "","Maria"},
                   {"Milena", "Sofia","","Musti","Virginia","", "","Slavcho"},
                   {"Borislav", "Venci","","Rado","","", "",""}
            };

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

            int[][] jaggedArray;
            // int[,][] jaggedArray = new int[2,3][];

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

            byte resultTest = 148;

            Console.WriteLine(Convert.ToString(resultTest, 2).PadLeft(16, '0'));
            // Console.WriteLine("{0,10:C4}", 148);
            Console.WriteLine("{0,10:X}", resultTest);
            /*
            for (i = 0; i < 10; i++)
            {
                Console.Write('^');
            }

            for (i = 0; i < 5; i++)
            {
                Console.Write('*');
            }
            */

            Console.WriteLine(createString(10, '^', "Stoyan", "Mariya"));

            Console.WriteLine("4! = {0}", factorial(4));
            Console.WriteLine("4! = {0}", factorialIteration(4));

            Console.WriteLine(23 + 45 + 45 + "23 this will be concatinated instead of added there is a string operad!"); // 11323 this will be concatinated instead of added there is a string operad!
            Console.WriteLine(13 / 2); // 6 integer divide by integer gives integer
            Console.WriteLine(13 / 2.0 ); // 6.5 integer divided by double gives double

            DateTime timeNow = DateTime.Now;
            timeNow = timeNow.AddYears(2);
            Console.WriteLine(timeNow); // 15.9.2018 г. 13:24:17 ч.

            DateTime myDateTime = new DateTime();
            Console.WriteLine(myDateTime); // 1.1.0001 г. 00:00:00 ч.

            string myString = new String('*', 10);
            Console.WriteLine(myString);
        }

        static string createString(int strLength, char str = '*', params string[] extra)
        {
            string temp = "";
            for (int i = 0; i < strLength; i++)
            {
                temp += str;
            }

            return temp;
        }

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

        static int factorialIteration(int n)
        {
            var factorial = 1;
            for (int i = 1; i <= n; i++)
            {
                factorial *= i;
            }

            return factorial;
        }
    }
}