随机，随机化，Rnd，种子值 [英] Random, Randomize, Rnd, seed values

问题描述

嘿所有，



我一直想知道在一定范围内生成随机数一段时间。

最近我我一直在使用这样的东西：

Hey all,

I''ve been wondering about generating random numbers within a certain range for a while.
Recently I''ve been using something like this a lot:

Dim Generator As New Random
Generator.Next(1, 30)

（生成1的数字）最多包括29）



过去我被告知使用Rnd并且我需要先调用Randomize，但因为我可以轻松生成一个随机数随机的一个范围我一直在使用它。很久以前我用过Rnd和Randomize。



我想做的是这样的：

我想要的当我加载表格时洗牌2副牌。

要洗牌一个牌组，我这样做：

(this generates numbers ranging from 1 up to and including 29)

In the past I was told to use Rnd and that I needed to call Randomize first, but because I can easily generate a random number within a range with Random I''ve been using that. It was long ago that I used Rnd and Randomize.

What I''m trying to do is something like this:
I want to shuffle 2 decks of cards as I load a form.
To shuffle one deck I do this:

Dim DeckBefore As New Collection
Dim DeckAfter As New Collection
Dim Position As New Random
Dim ChosenCard As Integer

While DeckBefore.Count > 0
    ChosenCard = Position.Next(1, DeckBefore.Count + 1)
    DeckAfter.Add(DeckBefore.Item(ChosenCard))
    DeckBefore.Remove(ChosenCard)
End While

想象一下Deck之前要成为这样的卡片列表：Spaces的空间，黑桃的两个，黑桃的三个......等等。
DeckAfter可能是这样的：Jack of Hearts，Seven俱乐部，钻石之王，黑桃之王......等等



我遇到的问题是，如果我将这个代码用于2个单独的套牌，他们最终会相同（虽然每次都不一样）。我知道这与Random的种子值有关，如果我不给它一个，它会自动选择种子值的日期/时间。



我想要的只是我的程序每次随机订购卡片，以便玩家无法预测（从他/她的头顶出来）下一张卡片。



任何帮助都将受到赞赏。

Imagine DeckBefore to be a list of cards like this: Ace of Spaces, Two of Spades, Three of Spades .. and so on
DeckAfter could be something like this: Jack of Hearts, Seven of Clubs, Three of Diamonds, King of Spades .. and so on

The problem I encounter is that if I use this code for 2 separate decks, they end up identically (although not the same each time). I understand this has to do with the seed value of the Random, and that is automatically picks the date/time for a seed value if I don''t give it one.

All I want really is for my program to order cards "randomly" each time so that a player won''t be able to predict (out of the top of his/her head) what card comes next.

any help would be appreciated.

推荐答案

不要在方法中声明Random对象。尝试在类级别声明一次。

Don''t declare the Random object in the method. Try declaring it once at the class level.

如果您愿意，可以选择自己设计的种子，但计算机上没有随机序列。我认为你还是安全的，这就是任何卡计划可能做的所有事情。

You can choose a seed of your own devising if you like, but there is no such thing as a random sequence on a computer. I think you''re still safe, this is about all that any card program probably does.

这篇关于随机，随机化，Rnd，种子值的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！