Re: 怎麼讓亂數不重複

[wvsrugby (wvsrugby)]

※ 引述《sy21113 (董小妤)》之銘言：
: Ｃ＃
: Random rd = new Random();
: for (i=0;i<20;i++)
: {
:   x=rd.Next(a,b);
:    Console.Write(" {0}",x);
: }
: 如何讓亂數不重複


static T[] Shuffle<T>(IEnumerable<T> values)
{
    List<T> list = new List<T>(values);
    T tmp; int j;
    Random r = new Random();
    for (int i = 0; i < list.Count; i++)
    {
        j = r.Next(i, list.Count);
        tmp = list[i]; list[i] = list[j];
        list[j] = tmp;
    }
    return list.ToArray();
}

void test()
{
    int[] idx = new int[36];
    for (int i = 0; i < idx.Length; i++)
        idx[i] = i;
    idx = Shuffle<int>(idx);
    for (int i = 0; i < idx.Length; i++)
        Console.WriteLine(idx[i]);
}

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