C#

Source[^]

Northwind Database is a sample database that is shipped along with Microsoft Access application. Basically, the database is about a company named "Northwind Traders". The database captures all the sales transactions that occurs between the company i.e. Northwind traders and its customers as well as the purchase transactions between Northwind and its suppliers.

public enum Suit
    {
    Spades = 0,
    Diamonds = 1,
    Clubs = 2,
    Hearts = 3,
    }
public class Card
    {
    private int _Value;
    public Suit Suit { get { return (Suit)(_Value / 13); } }
    public int Value { get { return _Value % 13; } }
    public Card(int value)
        {
        if (value < 0 || value >= 52)
            {
            throw new ArgumentException("Invalid Card : " + value);
            }
        _Value = value;
        }
    }

private List<Card> deck = new List<Card>();
private Random rand = new Random();
private Card GetNextCard(List<Card> deck)
    {
    if (deck.Count <= 0)
        {
        Enumerable.Range(0, 52).Select(c => new Card(c)).ToList();
        deck = Shuffle(deck);
        }
    Card card = deck[0];
    deck.RemoveAt(0);
    //deck.Add(card); //Uncomment this line to return cards to the bottom of the deck.
    return card;
    }
private List<Card> Shuffle(List<Card> deck)
    {
    List<Card> shuffled = new List<Card>();
    int cards = deck.Count;
    for (int i = 0; i < cards; i++)
        {
        int index = rand.Next(deck.Count);
        shuffled.Add(deck[index]);
        deck.RemoveAt(index);
        }
    return shuffled;
    }

Card c1 = GetNextCard(deck);
Card c2 = GetNextCard(deck);
Card c3 = GetNextCard(deck);
Card c4 = GetNextCard(deck);

using System;

namespace Draw4
{
    class Program
    {
        static int[] ranData = new int[4];
        static Random ran = new Random();
        static int[] KS = new int[4];

        static int GenerateRandomNum()
        {
            int cleanRanNum;
            cleanRanNum = ran.Next(1, 53);
            
            // Prevent cards from repeating

            return cleanRanNum;
        }
        static void Main(string[] args)
        {
            int idx, ranNum;
            int[] cdv = new int[4]; // 1-13
            int[] cds = new int[4]; // 1-4
            for (idx = 0; idx < 4; idx++) KS[idx] = 0;
            // loop 10,000 times
            //for (int lp = 0; lp < 10000; lp++)
            {
                // Draw 4 cards

                Console.Write("Random numbers: \t");
                for (idx = 0; idx < cdv.Length; idx++)
                {
                    ranNum = GenerateRandomNum();

                    Console.Write(ranNum + ",\t");
                    cdv[idx] = ranNum % 13;
                    if (cdv[idx] == 0)
                    {
                        cds[idx] = ranNum / 13;
                        cdv[idx] = 13;
                    }
                    else
                        cds[idx] = ranNum / 13 + 1;

                }
                Array.Sort(cdv);
                Console.Write("\nThe suits:\t\t");
                PrintingSuits(cds);
                Console.Write("\nThe values:\t\t");

                foreach (int val in cdv) Console.Write(val + ",\t");
                CountSuits(cds);
            }
            Console.Read();
        }
        static void CountSuits(int[] cds)
        {
            Array.Sort(cds);
            int howManySuits = 0;
            for (int j = 0; j < 3; j++)
                if (cds[j] != cds[j + 1]) howManySuits++;
            Console.WriteLine("\nThis hand has {0} suits", howManySuits + 1);
            return;

        }
        static void PrintingSuits(int[] suit)
        {
            string s = " ";
            foreach (int su in suit)
            {

                switch (su)
                {
                    case 1: s = "H"; break;
                    case 2: s = "S"; break;
                    case 3: s = "D"; break;
                    case 4: s = "C"; break;
                }

                Console.Write(s + ",\t");
            }
        }
    }
}

for (idx = 0; idx < cdv.Length; idx++)
{
    cdv[idx] = GetNext(deck);
    Console.WriteLine(cdv[idx]);
}

bool [] deck = new bool [52];

Mohan Subramani wrote:

1. When i use windows application in C#, on linking the SQL database am hardcoding the SQL server details (e.g: i harcode Machine1\SQLEXPRESS ) but if at all am changing the server in future to Machine2\SQLEXPRESS do i need to recompile my Code again ?