ggt

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

namespace ConsoleApp1
{
    class Program
    {
        static public int[] list = new int [10];
        static public String read;
        static public int x = 0;
        static public int g = 0;
        static public int a;
        static public int b;
        static public int z = 1;
        static public int lenght;

        static void Main(string[] args)
        {

            while (read != "exit")
            {
                if (g == 10)
                {
                    lenght = list.Length + 10;
                    int[] temp = new int[list.Length];
                    Array.Copy(list, temp, 10);
                    list = new int[lenght];
                    Array.Copy(temp, list, 10);
                }

                A:
                read = Console.ReadLine();
                if (read != "exit")
                {
                    list[x] = Int32.Parse(read);
                    if (list[x] == 0)
                    {
                        Console.WriteLine(" Die Zahl muss größer als 0 sein");
                        Console.ReadKey();
                        Console.Clear();
                        goto A;
                    }
                }
                g++;
                x++;
            }

            foreach (int i in list)
            {
                System.Console.Write("{0} ", i);
            }

            lenght = list.Length;
            a = list[0];
            while(lenght != 1)
            {
                b = list[z];
                while (b != 0)
                {
                    if (a > b)
                    {
                     a = a- b;
                    }
                else
                {
                    b = b - a;
                }
                }
                z++;
                lenght = lenght - 1;
            }
            Console.WriteLine("");
            Console.WriteLine("ggT: " + a);
            Console.ReadKey();
        }
    }
}