SumInAString

using System;

class SumInAString
{
    static void Main()
    {
        string digitString = "1 11  111 ";
        string tempSting = "",ch="";
        int count = 0;

        for (int i = 0; i < digitString.Length; i++)
        {
            ch = digitString.Substring(i, 1);
            if (ch != " ")
            {
                tempSting += ch;
            }
            else if (ch == " " && tempSting != "")
            {
                count += int.Parse(tempSting);
                tempSting = "";
            }
            if (i == digitString.Length - 1 && tempSting != "")
            {
                count += int.Parse(tempSting);
            }
        }
        Console.WriteLine(count);
    }
}