using System;

using System.Collections.Generic;

​

//移除陣列裡指定元素並回傳陣列新長度,不能創新陣列

public class Program

{

    public static void Main()

    {

        int[] nums = {3,2,2,3};

        int val =3;

        int len=nums.Length;

        int index=0;

        foreach(var i in nums)

        {

            if(i!=val)

                nums[index++] = i;          

        }

        Console.WriteLine(index);

    }

}