using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Übungen_LF6_WinFormanwendung
{
    class class_übungen
    {
        public static void main()
        {
            int temp = 0;

            temp = qsum(1234);

            Console.WriteLine("Quersumme: " + temp);
            Console.ReadLine();      

        }
        public static double max2(double a, double b)
        {
            double max = 0;
            if (a > b)
                max = a;
            else
                max = b;

            return max;
        }
        public static double max3(double a, double b, double c)
        {
            double max = 0;

            max = max2(a, b);
            max = max2(max, c);

            return max;

        }

        public bool istTeilerVon(int x, int d)
        {
            bool teilbar = false;
            try
            {
                if (x % d == 0)
                    teilbar = true;
                else
                    teilbar = false;

                return teilbar;
            }
            catch (Exception)
            {

                return false;
            }
        }


        public int qsum(int i)
        {
            
            string pufferlaenge = i.ToString();
            int querSumme = 0;

            int laenge = pufferlaenge.Length;

            for (int count = laenge-1; count >= 0; count--)
                querSumme += Convert.ToInt32(pufferlaenge.Substring(count,1));

            return querSumme;
        }

        public bool istPrim(int i)
        {
            bool prim = false;
            int countDivisions = 0;

            for (int counter = 1; counter == i; counter++)
            {
                if (i % counter == 0)
                    countDivisions++;
                
                
            }
            if (countDivisions <= 2)
                prim = true;
            else
                prim = false;

            return prim;
        }    

        public int euclid_old(int a, int b)
        {

            if (a == 0)
                return b;
            else
                while (b != 0)
                {
                    if (a > b)
                        a = a - b;
                    else
                        b = b - a;
                }
            return a;
            
        }

        }
    }
}