C# user input int to array

Question

I\'m asking the user to input 5 numbers and store it into an array so I can send the values in a method and subtract 5 numbers from each array. When I use the:

Answer 1

furkle is correct, it's not working because the console.ReadLine method returns a string, and you can't assign a string to an int array. However, the solution provided is a bit clunky because it only reads one character at a time from the console. It's better to take in all the input at once.

Here is a short console program that

• takes in a space separated list of integers from the user
• converts the string to a string List using Split(' ').ToList();
• Converts the string List to an int List
• Reads the contents back to you.

Error handling is included.

    static void Main(string[] args){

    var intList = new List();
    string sUserInput = "";
    var sList = new List();
    bool validInput = true;

    do
    {
        validInput = true;
        Console.WriteLine("input a space separated list of integers");
        sUserInput = Console.ReadLine();
        sList = sUserInput.Split(' ').ToList();

        try
        {
            foreach (var item in sList) {intList.Add(int.Parse(item));}
        }
        catch (Exception e)
        {
            validInput = false;
            Console.WriteLine("An error occurred. You may have entered the list incorrectly. Please make sure you only enter integer values separated by a space. \r\n");
        }
    } while (validInput == false);

    Console.WriteLine("\r\nHere are the contents of the intList:");
    foreach (var item in intList)
    {
        Console.WriteLine(item);
    }

    Console.WriteLine("\r\npress any key to exit...");
    Console.ReadKey();
    }//end main

If you want to make sure the user only enters a total of 5 integers you can do the DO WHILE loop like this:

    do
    {
        validInput = true;
        Console.WriteLine("input a space separated list of integers");
        sUserInput = Console.ReadLine();
        sList = sUserInput.Split(' ').ToList();

        if (sList.Count > 5)
        {
            validInput = false;
            Console.WriteLine("you entered too many integers. You must enter only 5 integers. \r\n");
        }
        else
        {
            try
            {
                foreach (var item in sList) { intList.Add(int.Parse(item)); }
            }
            catch (Exception e)
            {
                validInput = false;
                Console.WriteLine("An error occurred. You may have entered the list incorrectly. Please make sure you only enter integer values separated by a space. \r\n");
            }
        }

    } while (validInput == false);