CODEWITHSUNDEEP
c#if-statementrandomnumbersrepeat
Michael
Michael

Reputation: 1

Random numbers without repeat

random rd = new random();
int name = rd.Next(0,9);

if(name == 1 ) something will happen if(name == 2 ) something will happen if(name == 3 ) something will happen if(name == 4 ) something will happen if(name == 5 ) something will happen . . .

How do I make it so it doesn't repeat?

Upvotes: 0

Views: 753

Answers (2)

Tipx
Tipx

Reputation: 7505

As suggested in some comments, you should create a list (or a stack/queue, depending on your exact implementation) that is sorted "randomly". So, for example, you could do something like this:

class Program
{
    static void Main(string[] args)
    {
        List<int> allElements = new List<int>();
        for (int i = 0; i <= 9; i++)
            allElements.Add(i);

        Random rnd = new Random();
        Queue<int> myQueue = new Queue<int>(allElements.OrderBy(e => rnd.NextDouble()));

        while (myQueue.Count > 0)
        {
            int currentInt = myQueue.Dequeue();
            Console.WriteLine(currentInt);
        }

        Console.ReadLine();
    }
}

Upvotes: 0

Dmitrii Bychenko
Dmitrii Bychenko

Reputation: 186668

If I understood you right, you want to call all the actions in random order; to do that, create actions, say, an array:

  Action[] actions = new Action[] {
    () => {Console.Write("I'm the first");},
    () => {Console.Write("I'm the second");},
    ...
    () => {Console.Write("I'm the tenth");},
  };

then shuffle the collection (array):

  // simpelst, not thread safe
  static Random generator = new Random();

  ...

  int low = actions.GetLowerBound(0);
  int high = actions.GetUpperBound(0);

  for (int i = low; i < high; ++i) {
    int index = i + generator.Next(high - i + 1);

    var h = actions.GetValue(i);
    actions.SetValue(actions.GetValue(index), i);
    actions.SetValue(h, index);
  }

finally, call:

  foreach (var action in actions)
    action();

Upvotes: 1

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