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- using System.Globalization;
- using System.Net.NetworkInformation;
- using System.Text;
- class Progarm
- {
- static void Main()
- {
- // Greet();
- // See https://aka.ms/new-console-template for more information
- // 1. Hello World
- Console.WriteLine("Hello, World!");
- // Shortcuts Ctrl+. | Ctrl+r,r | cw \t\t | Ctrl+k,d | Ctrl+k,c | Ctrl+k,u
- // 2. Primitive data types, variables, literals
- byte myByte1 = 1;
- byte myByte2 = 7;
- sbyte mySByte1 = -1;
- Console.WriteLine(myByte1 + myByte2);
- // I. Types have: name (e.g. int), size, default value
- // II. Variables have: name (A-Za-z_0-9 all utf-8, can't start with 0-9, can't be a keyword), type, value
- // built-in types:
- //2.1. integer (default = 0)
- byte myByte = 23; // unsigned 8-bis (0 to 255) default = 0
- sbyte mySByte = -128; // signed 8-bit (-128 to 127) default = 0
- short myShort = -1000; // signed 16-bit (-32,768 to 32,767) default = 0
- ushort myUshort = 2000; // unsigned 16-bit (0 to 65,535) default = 0
- int myVar = 4; // signed 32-bit (-2,147,483,648 to 2,147,483,647)
- int myVar2 = 5; // signed 32-bit (-2,147,483,648 to 2,147,483,647)
- uint myUint = 12000U; // unsigned 32-bit (0 to 4, 294, 967, 295)
- int sum = myVar + myVar2; // signed 32-bit (-2,147,483,648 to 2,147,483,647)
- sum = 0xA8F1; // hexadecimal literal
- sum = 0XA8F1; // hexadecimal literal
- // Greet();
- long myLong = 42432L;// signed 64-bit (-9,223,372,036,854,775,808 to 9,223,372,036,854,775,807)
- ulong myUlong = 23423423U; // unsigned 64-bit (0 to 18,446,744,073,709,551,615)
- ulong maxIntValue = UInt64.MaxValue;
- Console.WriteLine(maxIntValue); // 18446744073709551615
- // 2.2. Real (default 0.0 for F/f D/d M/m)
- float myFloat = 4.566F; // signed 32-bit (±1.5e-45 to ±3.4e38) up to 7 symbols/digits
- myFloat = 67.8E35f; // litteral with "E/e"
- double myDouble = 34.56d; // signed 64-bit (±5.0e-324 to ±1.7e+308) up to 15-16 symbols/digits
- myDouble = -3.4e-10;
- decimal myDecimal = 23.45M; // signed 128-bit (±1.0e-28 to ±7.9e28) precission 28-29 symbols/digits, closest to 0 ±1.0e-28, decimal floating-point arithmetic
- // Declare some variables
- float floatPI = 3.141592653589793238f;
- double doublePI = 3.141592653589793238;
- decimal decimalPI = 3.14159265358979323846m;
- Console.WriteLine("Float PI is: " + floatPI); // Float PI is: 3.141593 only 7 digits
- Console.WriteLine("Double PI is: " + doublePI); // Double PI is: 3.14159265358979 16 digits
- Console.WriteLine(decimalPI); // 3.14159265358979323846
- // 2.3. Char
- char myFirstLetter = 'S';
- Console.WriteLine((int)myFirstLetter);
- char symbol = (char)78;
- Console.WriteLine(symbol);
- char myChar = '\u0065';
- Console.WriteLine(myChar);
- myChar = '\uffff';
- Console.WriteLine(myChar);
- myChar = '\'';
- // escaping
- char myEscape = '\n'; // \n \t \r \' \\ \" \uXXXX
- // 2.4. String (default null) Reference, value in the heap. String.Compare(string1, string2) > 0 if they have to switch
- string myName = "Stoyan Cheresharov";
- // 2.5. Bool (default false)
- bool myBool = true; // false | true
- Object myObject = 2;
- myObject = "Stoyan";
- // 3.
- int a = 5;
- int b = 4;
- Console.WriteLine(a + b); // 9
- Console.WriteLine(a + b++); // 9
- Console.WriteLine(a + b); // 10
- Console.WriteLine(a + (++b)); // 11
- Console.WriteLine(a + b); // 11
- Console.WriteLine(14 / a); // 2
- Console.WriteLine(14 % a); // 4
- // 3.1. Arithmetic operators
- a = 11;
- b = 2;
- // Arithmetic operators
- Console.WriteLine(a + b);
- Console.WriteLine(a - b);
- Console.WriteLine(a / b);
- Console.WriteLine(a * b);
- Console.WriteLine(a++);
- Console.WriteLine(a);
- Console.WriteLine(++a);
- Console.WriteLine(a % b);
- Console.WriteLine(--a);
- Console.WriteLine(a--);
- //3.2. For comparison
- Console.WriteLine(a > b);
- Console.WriteLine(a < b);
- Console.WriteLine(a >= b);
- Console.WriteLine(a <= b);
- Console.WriteLine(a == b);
- Console.WriteLine(a != b);
- //3.3. Logical
- bool x = true;
- bool y = false;
- Console.WriteLine(x && y);
- Console.WriteLine(x || y);
- Console.WriteLine(x ^ y);
- Console.WriteLine(!x);
- //&&
- //x y z
- //0 0 0
- //1 0 0
- //0 1 0
- //1 1 1
- // ||
- //x y z
- //0 0 0
- //1 0 1
- //0 1 1
- //1 1 1
- // ^
- //x y z
- //0 0 0
- //1 0 1
- //0 1 1
- //1 1 0
- // !
- //x z
- //0 1
- //1 0
- ////3.4. for asignments
- //a += 3; // a = a + 3;
- ////3.5. Bitwise operators
- //Console.WriteLine(1 << 1);
- //Console.WriteLine(2 >> 1);
- //Console.WriteLine(1 | 2);
- //Console.WriteLine(1 & 2);
- //Console.WriteLine(1 ^ 3);// 2
- //// 3.6. trinary
- //int c = (a > b) ? a : b;
- //if (a > b)
- //{
- // c = a;
- //}
- //else
- //{
- // c = b;
- //}
- ////int? a1 = null;
- ////int? b1 = 6;
- //// a1 = null;
- ////int? z = a1 ?? b1;
- /*
- // 4. Console
- Console.OutputEncoding = Encoding.UTF8;
- Thread.CurrentThread.CurrentCulture = CultureInfo.GetCultureInfo("de-DE");
- Console.Write("Stoyan ");
- Console.Write("Cheresharov");
- Console.WriteLine("My name is Desi. I am {0} years old. my favorite number is {1}", 10, 3);
- Console.WriteLine("{0,10:C2} I will continue", 1234);
- // Formatting Numbers
- // Standard Formatting Symbols C, D, E, F, N, P, X
- Console.WriteLine("{0:C2}", 123.456); //Output: 123,46 лв.
- Console.WriteLine("{0:D6}", -1234); //Output: -001234
- Console.WriteLine("{0:E2}", 123); //Output: 1,23Е+002
- Console.WriteLine("{0:F2}", -123.456); //Output: -123,46
- Console.WriteLine("{0:N2}", 1234567.8); //Output: 1 234 567,80
- Console.WriteLine("{0:P}", 0.456); //Output: 45,60 %
- Console.WriteLine("{0:X}", 254); //Output: FE
- // Custom Formatting Symbols 0000, ###, %, E0 Е+0 Е-0
- Console.WriteLine("{0:0.00}", 1); //Output: 1,00
- Console.WriteLine("{0:#.##}", 0.234); //Output: ,23
- Console.WriteLine("{0:#####}", 12345.67); //Output: 12346
- Console.WriteLine("{0:(0#) ### ## ##}", 29342525); //Output: (02) 934 25 25
- Console.WriteLine("{0:%##}", 0.234);//Output: %23
- //Console.ForegroundColor = ConsoleColor.DarkYellow;
- //Console.BackgroundColor = ConsoleColor.DarkBlue;
- Console.Clear();
- // Standard Formatting Symbols for DateTime
- DateTime d = DateTime.Now;
- Console.WriteLine("{0:d}", d); // d D
- //Console.SetCursorPosition(5, 10); // left top
- Console.WriteLine("Това е кирилица: ☺");
- // char unicorn = '\u1F984'; ???
- Console.Write("Please enter your age: ");
- int age = int.Parse(Console.ReadLine());
- string name = "Stoyan";
- char firstLetter = name[0];
- int number = 312321;
- string numberString = number.ToString();
- Console.WriteLine(numberString[1]);
- // 5. Conditional Logic
- int secondNumber = 3;
- int firstNumber = 2;
- if (secondNumber > firstNumber)
- {
- Console.WriteLine("secondNumber > firstNumber");
- }
- if (true)
- {
- Console.WriteLine("secondNumber > firstNumber");
- }
- else
- {
- Console.WriteLine("secondNumber > firstNumber");
- }
- int myAge = 12;
- if (myAge < 3)
- {
- Console.WriteLine("You are a baby!");
- }
- else if (3 <= myAge && myAge < 12)
- {
- Console.WriteLine("You are a kid!");
- }
- else if (12 <= myAge && myAge < 18)
- {
- Console.WriteLine("You are a teenager!");
- }
- else if (18 <= myAge && myAge < 30)
- {
- Console.WriteLine("You are in your golden age!");
- }
- else
- {
- Console.WriteLine("You are an adult");
- }
- char firtsLetter = 'S';
- switch (firtsLetter)
- {
- case 'A':
- case 'S':
- Console.WriteLine("Your first letter tells me you are a lucky man!");
- break;
- case 'V':
- Console.WriteLine("You are victorious!");
- break;
- default:
- Console.WriteLine("I don't know?");
- break;
- }
- // 6. loops
- int i = 0;
- while (i < 100)
- {
- Console.WriteLine(i);
- i++;
- }
- int number1 = 0;
- do
- {
- Console.Write("Please, enter a number between 0 and 10:");
- number1 = int.Parse(Console.ReadLine());
- } while (number1 < 0 || number1 > 10);
- for (i = 0; i < 100; i++)
- {
- Console.WriteLine(i);
- }
- int[] myArray = { 1, 2, 3,};
- foreach (var item in myArray)
- {
- Console.WriteLine(item);
- }
- Console.Write("Please, enter a character: ");
- int myChar1 = Console.Read();
- Console.WriteLine(myChar1);
- // int lucky = 1235;
- int a1, a2, a3, a4;
- for (int lucky = 0; lucky <= 9999; lucky++)
- {
- a1 = lucky / 1000;
- a2 = (lucky / 100) % 10;
- a3 = (lucky / 10) % 10;
- a4 = lucky % 10;
- if (a1 + a2 == a3 + a4)
- {
- Console.WriteLine(lucky);
- }
- }
- */
- Console.Clear();
- // 7.
- int[] ints = { 212, 22, 3, 4 };
- ints[0] = 34;
- Console.WriteLine(ints[0]);
- // 7.1.
- int[] ints1 = new int[3];
- ints1[1] = 4;
- // 7.2.
- int[] ints2 = new int[3] { 32, 45, 67 };
- int lastElement = ints2[ints2.Length - 1];
- for (int i = 0; i < ints2.Length; i++)
- {
- Console.WriteLine(ints2[i]);
- }
- int[,] matrix =
- {
- {32, 34, 45 },
- { 56, 54, 34},
- { 543, 34, 43}
- };
- int[][] jagged = {
- new int[] { 32, 45, 67},
- new int[] {6456, 5435, 54345, 545}
- };
- Console.WriteLine(jagged[1][1]);
- List<int> myList = new List<int>();
- myList.Add(23);
- Dictionary<string, string> myDictionary = new Dictionary<string, string>();
- myDictionary.Add("щастлив", "happy");
- Console.WriteLine(myDictionary["щастлив"]);
- var tugay = "String";
- // var myInput = int.Parse(Console.ReadLine());
- foreach (var item in myList)
- {
- Console.WriteLine(item);
- }
- string[] places = { "София", "пловдив" };
- int counter = 0;
- for (int i = 0; i < places.Length; i++)
- {
- if (char.IsUpper(places[i][0]))
- {
- Console.WriteLine(places[i]);
- counter++;
- }
- }
- Console.WriteLine("The cities with capital Letter are {0}", counter);
- Console.WriteLine("2093 to BIN {0}.", Convert.ToString(2093, 2));
- Console.WriteLine("2093 to OCT {0}.", Convert.ToString(2093, 8));
- Console.WriteLine("2093 to HEX {0}.", Convert.ToString(2093, 16));
- Console.WriteLine("2093 In a number system with base/radix = 5 {0}.",
- Convert.ToString(2093, 2));
- Console.WriteLine();
- for (int i = ints2.Length - 1; i >= 0; i--)
- {
- Console.WriteLine(ints2[i]);
- }
- //Console.WriteLine(DateTime.Now);
- //int x1 = 0, y1 = 0;
- //while (true)
- //{
- // Console.Clear();
- // Console.SetCursorPosition(x1, y1);
- // Console.WriteLine(DateTime.Now);
- // Thread.Sleep(10);
- // x1++;
- // y1++;
- //}
- // 8.
- // IV
- //VI
- //44(10)
- //4 * 10 ^ 1 + 4 * 10 ^ 0 = 40 + 4
- //44(8)
- //4 * 8 ^ 1 + 4 * 8 ^ 0 = 32 + 4 = 36
- //44(5)
- //4 * 5 ^ 1 + 4 * 5 ^ 0 = 20 + 4 = 24
- //44
- //44 : 2 = 22 | 0
- //22 : 2 = 11 | 0
- //11 : 2 = 5 | 1
- //5 : 2 = 2 | 1
- //2 : 2 = 1 | 0
- // 1
- //101100(2) = 44(10)
- //0010 1100
- //2C
- //8421
- //101 100
- //5 4
- //54()
- //23.45
- //23 : 2 = 11 | 1
- //11 : 2 = 5 | 1
- //5 : 2 = 2 | 1
- //2 : 2 = 1 | 0
- // 1
- //10111.011
- //1.0111011 * 2 ^ 4
- //.45 * 2 = 0.9 | 0
- //0.9 * 2 = 0.8 | 1
- //0.8 * 2 = 0.6 | 1
- //123.56 => 1,23.56 * 10 ^ 2
- //number = 346
- //(r ^ n - 1) - number
- //(10 ^ 3 - 1) - 346 =
- //999
- //-
- //346
- //---- -
- //653
- //9999999999
- //-
- //4332423532
- //----------------
- //5667...
- //1111111111111
- //-
- //1010101111111
- //------------------
- //0101010000000
- //(r ^ n - 1) - number
- //(r ^ n) - number
- //7 - 3 = 4
- //7 + 7 = 1 | 4
- /*
- // ------ in a nutshell -----
- //a += 3; // a = a + 3;
- //// essentials
- //// 4.
- //Console.WriteLine();
- //string name = Console.ReadLine();
- //double n = double.Parse(Console.ReadLine());
- //// 5. Conditional logic
- //// 5.1.
- //if (a > 5)
- //{
- // Console.WriteLine("a > 5");
- //}
- //if (a > 5)
- //{
- // Console.WriteLine("a > 5");
- //}
- //else
- //{
- // Console.WriteLine("a < 5");
- //}
- //Console.WriteLine("Please enter your age: ");
- //int age = int.Parse(Console.ReadLine());
- //if (age > 0 && age <= 3)
- //{
- // Console.WriteLine("You are a baby");
- //}
- //else if (age > 3 && age <= 12)
- //{
- // Console.WriteLine("You are a kid");
- //}
- //else if (age > 12 && age <= 18)
- //{
- // Console.WriteLine("You are a teenager");
- //}
- //else
- //{
- // Console.WriteLine("You are an adult");
- //}
- //char firstLetter = Char.Parse(Console.ReadLine());
- //switch (firstLetter)
- //{
- // case 'A':
- // case 'N':
- // Console.WriteLine("Maybe your name is Nilyay");
- // break;
- // default:
- // Console.WriteLine("I don't know");
- // break;
- //}
- //// 6. Loops
- //int i = 0;
- //while (i < 100)
- //{
- // Console.WriteLine(i);
- // i++;
- //}
- //do
- //{
- // Console.WriteLine("Please enter your age: ");
- // age = int.Parse(Console.ReadLine());
- //} while (age < 0 && age > 120);
- //for (i = 0; i < 100; i++)
- //{
- // Console.WriteLine(i);
- //}
- Greet("Nilyay");
- int[] ages = new int[10];
- ages[0] = 18;
- ages[5] = 17;
- foreach (int item in ages)
- {
- Console.WriteLine(item);
- }
- Greet("Magi");
- int number = 5698;
- int a1 = number / 1000;
- int a2 = (number / 100) % 10;
- int a3 = (number / 10) % 10;
- int a4 = number % 10;
- Console.WriteLine("The number in reverse is {0}{1}{2}{3}", a4, a3, a2, a1);
- }
- static void Greet(string name = "Megan")
- {
- Console.WriteLine("Hello" + name);
- }
- static int CalculateSum(int a, int b)
- {
- return a + b;
- }
- */
- }
- }
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