C # basic exercises,

C # basic exercises,

 

1. Bubble Sorting

namespace _0{    class Program    {        public static int[] BubbleSort(int[] arr)        {            for (int i = 0; i < arr.Length - 1; i++)            {                for (int j = 0; j < arr.Length - 1; j++)                {                    if (arr[j] > arr[j + 1])                    {                        int temp = arr[j];                        arr[j] = arr[j + 1];                        arr[j + 1] = temp;                    }                }            }            return arr;        }        static void Main(string[] args)        {            int[] numbers = { 2, 5, -7, 9, 3, 2, 1, -3, 0, 2 };            int[] result = BubbleSort(numbers);            for (int i = 0; i < result.Length; i++)            {                Console.Write("{0} ", result[i]);            }            Console.ReadKey();        }    }}

 

2. 100 ~ The number of daffodils between 999

Namespace _ 0 {class Program {public static bool Daffodils (int arr) {int hundreds = arr/100;// Obtain hundreds of BITsInt ten = arr/10% 10;// Obtain ten digitsInt single = arr % 10;// Obtain the single digitInt n = (hundreds * hundreds) + (ten * ten) + (single * single); if (arr = n) {return true ;} return false;} static void Main (string [] args) {for (int I = 100; I <999; I ++) {bool flag = Daffodils (I ); if (flag) {Console. writeLine ("Daffodils: {0}", I) ;}} Console. readKey ();}}}

 

3. Retrieve the maximum and minimum values in the array.

namespace _0{    class Program    {        public static int[] ReturnMaxAndMin(int[] arr)        {            int[] result = { arr[0], arr[0] };            for (int i = 0; i < arr.Length; i++)            {                if (arr[i] > result[0])                {                    result[0] = arr[i];                }                else if (arr[i] < result[1])                {                    result[1] = arr[i];                }            }            return result;        }        static void Main(string[] args)        {            int[] arrary = { 1, 2, 4, 6, 7, 8, -1, 2, -4 };            int[] numbers = ReturnMaxAndMin(arrary);            Console.WriteLine("Max number: {0}, Min number: {1}", numbers[0], numbers[1]);            Console.ReadKey();        }    }}