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- using System;
- using System.Text;
- namespace Chapter6
- {
- class Program
- {
- static void Main(string[] args)
- {
- //string[] students = new string[100];
- //students[0] = "Konstantin";
- //students[1] = "Angel";
- //Console.WriteLine(students[0]);
- //int[] myArray = { 1, 2, 3, 4, 5, 6 };
- //int[] myArray2 = new int[3] { 23, 45, 67 };
- //string[] daysOfWeek =
- //{
- // "Monday",
- // "Tuesday",
- // "Wednesday",
- // "Thursday",
- // "Friday",
- // "Saturday",
- // "Sunday"
- //};
- //int[] array = new int[] { 1, 2, 3, 4, 5 };
- //for (int index = 0; index < array.Length; index++)
- //{
- // // Doubling the number
- // array[index] = 2 * array[index];
- // // Print the number
- // Console.Write(array[index] + " ");
- //}
- //foreach (var item in array)
- //{
- // Console.Write(item + " ");
- //}
- //int[] reversed = new int[array.Length];
- //for (int i = 0; i < array.Length; i++)
- //{
- // reversed[reversed.Length - 1 - i] = array[i];
- //}
- //for (int i = 0; i < reversed.Length; i++)
- //{
- // Console.WriteLine("reversed[{0}] = {1}", i, reversed[i]);
- //}
- //for (int i = 0; i < array.Length; i++)
- //{
- // Console.Write("Please, enter the value of array[{0}] = ", i);
- // array[i] = int.Parse(Console.ReadLine());
- //}
- //int[,] matrix1 = new int[3, 4];
- //int[,] matrix =
- //{
- // {1, 2, 3, 4}, // row 0 values
- // {5, 6, 7, 8}, // row 1 values
- //};
- //Console.WriteLine();
- //Console.WriteLine(matrix[0, 3]); // 4
- //Console.WriteLine(matrix.GetLength(0));
- //Console.WriteLine(matrix.GetLength(1));
- //for (int i = 0; i < matrix.GetLength(0); i++)
- //{
- // for (int j = 0; j < matrix.GetLength(1); j++)
- // {
- // // Console.WriteLine($"matrix[{i},{j}] = {matrix[i,j]}");
- // Console.WriteLine("matrix[{0},{1}]={2}", i,j, matrix[i,j]);
- // }
- //}
- //int[][] myJaggedArray = {
- // new int[] {5, 7, 2},
- // new int[] {10, 20, 40},
- // new int[] {3, 25},
- // new int[] { 1,2,3,4,5,6,78,9}
- //};
- //int[][,] jaggedOfMulti = new int[2][,];
- //// another way to declare jagged array
- //int[][] jaggedArray;
- //jaggedArray = new int[2][];
- //jaggedArray[0] = new int[5];
- //jaggedArray[1] = new int[3];
- //int min;
- //int max;
- //int number;
- //Console.Write("Please, enter an integer number:");
- //number = int.Parse(Console.ReadLine());
- //min = number;
- //max = number;
- //for (int i = 0; i < 9; i++)
- //{
- // Console.Write("Please, enter an integer number:");
- // number = int.Parse(Console.ReadLine());
- // if (number < min) min = number;
- // if (number > max) max = number;
- //}
- //Console.WriteLine("min = {0}", min);
- //Console.WriteLine("max = {0}", max);
- //int n;
- //do
- //{
- // Console.Write("Please enter a positive number:");
- // n = int.Parse(Console.ReadLine());
- //} while (n < 1);
- //int smallest = n;
- //int biggest = n;
- //for (int i = 0; i < 5; i++)
- //{
- // do
- // {
- // Console.Write("Please enter a positive number:");
- // n = int.Parse(Console.ReadLine());
- // } while (n < 1);
- // if (smallest > n)
- // {
- // smallest = n;
- // }
- // if (biggest < n)
- // {
- // biggest = n;
- // }
- //}
- //Console.WriteLine(smallest);
- //Console.WriteLine(biggest);
- // Напишете програма, която отпечатва всички възможни карти от стандартно тесте карти без джокери (имаме 52 карти: 4 бои по 13 карти).
- // The four French playing cards suits used primarily in the English-speaking world: diamonds (♦), clubs (♣), hearts (♥) and spades (♠)
- //Console.OutputEncoding = Encoding.UTF8;
- //string symbolName;
- //string cardName;
- //for (int symbol = 0; symbol < 4; symbol++)
- //{
- // switch (symbol)
- // {
- // case 0:
- // symbolName = "diamonds (♦)";
- // break;
- // case 1:
- // symbolName = "clubs (♣)";
- // break;
- // case 2:
- // symbolName = "hearts (♥)";
- // break;
- // case 3:
- // symbolName = "spades (♠)";
- // break;
- // default:
- // symbolName = "";
- // break;
- // }
- // for (int card = 1; card < 14; card++)
- // {
- // switch (card)
- // {
- // case 11:
- // cardName = "Jack";
- // break;
- // case 12:
- // cardName = "Queen";
- // break;
- // case 13:
- // cardName = "King";
- // break;
- // case 1:
- // cardName = "Ace";
- // break;
- // default:
- // cardName = "";
- // break;
- // }
- // Console.WriteLine("symbol = {0}, card = {1}", symbolName, ( card > 1 && card <= 10)? card.ToString() : cardName);
- // }
- //}
- Console.Write("Please, enter n = ");
- int n = int.Parse(Console.ReadLine());
- ulong previous1 = 0;
- ulong previous2 = 1;
- ulong current = 1;
- ulong sum = 0;
- for (int i = 0; i < n; i++)
- {
- checked
- {
- current = previous1 + previous2;
- Console.WriteLine("{0} - {1}, ", i, current);
- sum += current;
- previous1 = previous2;
- previous2 = current;
- }
- }
- Console.WriteLine("sum = {0}", sum);
- }
- }
- }
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