随机填充数组，不重复 [英] Filling an array randomly with no repetitions

问题描述

我试图用 1-10 的随机数填充一个数组，没有重复.我尝试用递归来做到这一点.我正在尝试使用递归和不使用它(这里两者都有，两种方式都没有运气).我有两个代码，都不起作用:

I'm trying to fill an array with random numbers from 1-10 with no repeat. I try to do it with recursion. I'm trying to it with recursion and without (here is both with, no luck in either way). I have two codes, boths not working:

1:

static int reco(int arr,int[] times)
{
    Random rnd = new Random();
    arr = rnd.Next(1, 11);
    return times[arr] > 0 ? reco(arr, times) : arr;
}

static void Main(string[] args)
{
    int i = 0;
    int[] arr = new int[10];
    int[] times = new int[11];
    Random rnd = new Random();

    for (i = 0; i < 10; i++)
    {
        arr[i] = rnd.Next(1, 11);
        times[arr[i]]++;

        if (times[arr[i]] > 0)
            arr[i] = reco(arr[i], times);
    }

<小时>

2:

static int reco(int arr,int[] times)
{
    Random rnd = new Random();
    arr = rnd.Next(1, 11);
    if (times[arr] > 0)
        return reco(arr, times);
    else
        return arr;
}
static void Main(string[] args)
{
    int i = 0;
    int[] arr = new int[10];
    int[] times = new int[11];
    Random rnd = new Random();
    for (i = 0; i < 10; i++)
    {
        arr[i] = rnd.Next(1, 11);

        if (times[arr[i]] > 0)
            arr[i] = reco(arr[i], times);

        times[arr[i]]++;
    }
}

推荐答案

如果你只想要 1 到 10 之间的随机数，你可以使用 Enumerable.Range 并随机排序.

If you just want random numbers between 1 and 10, you could just use Enumerable.Range and order randomly.

var ran = new Random();
int[] randomArray = Enumerable.Range(1, 10).OrderBy(x => ran.Next()).ToArray();

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