删除指定数组中的元素使用Random类 [英] Deleting A Specified Element In An Array Using Random Class

问题描述

class Check
{
     public static void Main()
     {         
              int[] arr1 = new int[] { 1, 2, 3 };
              Console.WriteLine("The Number That Left Us Is");
              Random rnd = new Random();
              int r = rnd.Next(arr1.Length);
              int Left = (arr1[r]);
              Console.WriteLine(Left);
      }
 }

如果2生成我想要2被删除而剩下的我必须留下应该是1和3
谁能帮助。可它在阵列来完成。

If 2 is generated i want the 2 to be removed and the remaining i have to be left with should be 1 and 3. Can anyone help. Can it be done in array.

推荐答案

数组不能调整大小，一个你设置他们，他们是大小永远。

Arrays can not be re-sized, one you set them they are that size forever.

最佳的选择是使用列表< INT>将代替 INT []

The "best" option is use a List<int> instead of an int[]

class Check
{
     public static void Main()
     {         
              List<int> arr1 = List<int>int[] { 1, 2, 3 };
              Console.WriteLine("The Number That Left Us Is");
              Random rnd = new Random();
              int r = rnd.Next(arr1.Length);
              int Left = (arr1[r]);
              arr1.RemoveAt(r);
              Console.WriteLine(Left);
      }
 }

要真正建立一个规模更小的新数组需要更多的代码。

To actually create a new array of one size smaller will take more code.

class Check
{
     public static void Main()
     {         
              int[] arr1 = int[] { 1, 2, 3 };
              Console.WriteLine("The Number That Left Us Is");
              Random rnd = new Random();
              int r = rnd.Next(arr1.Length);
              int Left = (arr1[r]);

              int oldLength = arr1.Length;
              arrTmp = arr1;                  
              arr1 = new int[oldLength - 1];
              Array.Copy(arrTmp, arr1, r);
              Array.Copy(arrTmp, r+1, arr1, r, oldLength - r - 1);

              Console.WriteLine(Left);
      }
 }

---

你提到你必须坚持使用数组，这是很容易打开列表中的数组

---

You mention "You gotta stick with the arrays", it is VERY easy to turn the list in to an array

class Check
{
     public static void Main()
     {         
              List<int> arr1 = List<int>int[] { 1, 2, 3 };
              Console.WriteLine("The Number That Left Us Is");
              Random rnd = new Random();
              int r = rnd.Next(arr1.Length);
              int Left = (arr1[r]);
              arr1.RemoveAt(r);
              Console.WriteLine(Left);
              SomeFunctionThatTakesAnArrayAsAnArgument(arr1.ToArray());
      }
 }

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