How can I append values in a C# array? [duplicate]

Question

I need to add values to my array one integer value at a time, via user input.

I don't know how to ask it more clearly, but my goal is to define an integer array in Main(), then pass it to Interactive() where a user is supposed to enter 20 different ints and the program should add them to the array.

It would be tedious to continue defining new arguments for each object (like this):

int One = ArrayOne[0]
int Two = ArrayOne[1]
int Three = ArrayOne[2]

because I am filling 20 array objects, surely there is an easier way?

Can someone help?

Here is the code I am working with:

    class Program
    {
        static void Main(string[] args)
        {
            int[] intArray = new int[20];
        }

        public static int[] Interactive(int[] args)
        {
            int[] ArrayOne = new int[20];

            Write("\n   Write an integer >>");
            ArrayOne[0] = Convert.ToInt32(ReadLine());

            foreach (int x in ArrayOne)
            {
                if (x != ArrayOne[0])
                    Write("\n   Write another integer");
                ArrayOne[x] = Convert.ToInt32(ReadLine());
                WriteLine("\n   {0}", ArrayOne[x]);
            }

            ReadLine();

            return ArrayOne;
        }

    }

Ask your instructor to check linked duplicates to clarify which of the answer they expect you to copy-paste - one adding elements to pre-allocated array, anther increasing array size. — Alexei Levenkov
– Alexei Levenkov, Commented May 15, 2017 at 4:04

EJoshuaS - Stand with Ukraine · Accepted Answer · 2017-05-15 04:17:59Z

0

Try using a List. Unlike arrays their size can be dynamically changed.

using System.Collections.Generic;

public class Example
{
    public static void Main()
    {
        List<int> numbers = new List<int>();
        numbers.add(1);
        numbers.add(2);
    }

}

edited May 15, 2017 at 4:17

EJoshuaS - Stand with Ukraine

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answered May 15, 2017 at 3:39

user4119200

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2 Comments

chickenbiscuit Over a year ago

I originally had a list, but I am required by my instructor to use array. Thanks though!

EJoshuaS - Stand with Ukraine Over a year ago

List uses an Array "under the hood" anyway.

Willy David Jr · Accepted Answer · 2017-05-15 03:12:15Z

0

Are you looking for this?

 int[] intArray = Interactive(values here);

public static int[] Interactive(int[] args)
    {
     //TODO:
    }

answered May 15, 2017 at 3:12

Willy David Jr

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1 Comment

chickenbiscuit Over a year ago

hm. I don't know how much that helps. I've already gotten that part figured out I guess. I need to add values to my array one int at a time, via user input.

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