Lottery algorithm and lottery probability algorithm

Lottery algorithm and lottery probability algorithm

I am not satisfied with the lottery code I found on the Internet. If I need it, I can use it directly without the copyright fee.

/// <Summary> /// Lucky Draw /// </summary> public class Prize {// <summary> // Prize keyword /// </summary> public string Key {get; set ;}//< summary> /// weight/quantity /// </summary> public int Poll {get; set ;} /// <summary> /// winning range /// </summary> class Area {// <summary> // prize keyword /// </summary> public string Key {get; set ;}//< summary> /// Start index location /// </summary> public int Start {get; set ;}/// <summary>/ // End index position // </summary> public int Over {get; set ;}} /// <summary> /// Random Seed /// </summary> static Random Rand = new Random (int) DateTime. now. ticks); /// <summary> // The Lottery Draw and weight (the size of the area occupied by the wheel) is the chance of winning the prize /// </summary> /// <param name = "prizeList"> gift list (if it is not a winning prize, leave the wheel blank and add it to the list) </param> // <returns> </returns> public static string Roulette (List <Prize> prizeList) {if (prizeList = null | prizeList. count = 0) Return string. empty; if (prizeList. any (x => x. poll <1) throw new ArgumentOutOfRangeException ("poll weight cannot be less than 1"); if (prizeList. count = 1) return prizeList [0]. key; // only one gift Int32 total = prizeList. sum (x => x. poll); // weight and if (total> 1000) throw new ArgumentOutOfRangeException ("poll weight and cannot exceed 1000"); // array storage space restrictions. A maximum of one thousand prizes (and each prize has a weight of 1) List <int> speed = new List <int> (); // Random Seed for (int I = 0; I <total; I ++) speed. add (I); int pos = 0; Dictionary <int, string> box = new Dictionary <int, string> (); foreach (Prize p in prizeList) {for (int c = 0; c <p. poll; c ++) // The larger the weight, the more parts it occupies. {pos = Prize. rand. next (speed. count); // obtain the Random Seed coordinate box [speed [pos] = p. key; // random gifts are indexed in the box of speed [pos. removeAt (pos); // remove the extracted box Index No.} return box [Prize. rand. next (total)] ;}/// <summary> // Prize box lottery. Each participant corresponds to a prize box, prize box as many people participate /// </summary> /// <param name = "prizeList"> gift list </param> /// <param name =" peopleCount "> participants </param> // <returns> </returns> public static string LunkyBox (List <Prize> prizeList, int peopleCount) {if (prizeList = null | prizeList. count = 0) return string. empty; if (prizeList. any (x => x. poll <1) throw new ArgumentOutOfRangeException ("the number of poll gifts cannot be less than 1"); if (lelecount <1) throw new ArgumentOutOfRangeException ("the number of parameters cannot be less than 1"); if (prizeList. count = 1 & peopleCount <= prizeList [0]. poll) return prizeList [0]. key; // there is only one type of gift and the number of gifts is greater than or equal to the number of participants int pos = 0; List <Area> box = new List <Area> (); foreach (Prize p in prizeList) {box. add (new Area () {Key = p. key, Start = pos, Over = pos + p. poll}); // place the gift in the prize box range pos = Pos + p. poll;} int total = prizeList. sum (x => x. poll); // total number of gifts int speed = Math. max (total, peopleCount); // obtain the maximum number of gifts and the maximum number of parameters in the total number of pos = Prize. rand. next (speed); Area a = box. firstOrDefault (x => pos> = x. start & pos <x. over); // search for the index in the prize box. return a = null? String. empty:. key ;}}/* List <Prize> prizes = new List <Prize> (); prizes. add (new Prize () {Key = "computer", Poll = 1}); prizes. add (new Prize () {Key = "cabinet", Poll = 2}); prizes. add (new Prize () {Key = "Mouse", Poll = 3}); string lp1 = Prize. lunkyBox (prizes, 6); Console. writeLine (lp1); prizes. add (new Prize () {Key = "Thank you for your patronage", Poll = 5}); string lp2 = Prize. roulette (prizes); Console. writeLine (lp2 );*/