c# - 如何将数组中的每个单词字母带入

Question

I have a problem in my code and I have no idea how to fix it. I need to copy every letter of the user entered word to array, but there is an error "Index was outside the bounds of the array". I know that thir error means that I don't have correct size of the array, but I am using ReadLine and I can't enter static size. It can be changed due user entered text.

Code:

static void Main(string[] args)
        {

            int c = 0;
            string text = Console.ReadLine();

            string[] str = new string[] { };



            foreach (char letter in text)
            {

                str[c] = Convert.ToString(letter);
                Console.WriteLine(str[c]);
                c++;
            }
        }

Answer 1

You should define length of str

static void Main(string[] args)
{
    int c = 0;
    string text = Console.ReadLine();
    string[] str = new string[text.Length];//<-- NOTE THIS
    foreach (char letter in text)
    {
        str[c] = Convert.ToString(letter);
        Console.WriteLine(str[c]);
        c++;
    }
}

Answer 2

You can use Linq to make this a one-liner:

using System.Linq;
// ...
// ...
var separateLettersAsList = text.ToList();
var separateLettersAsArray = text.ToArray();