using System;

namespace _01OperatorOverloading
{
    class Bruch
    {
        private int z, n;
        public Bruch(int Z, int N = 1)
        {
            z = Z;
            if (N == 0)
                throw new ArgumentNullException("Nenner darf nicht 0 sein!");
            n = N;
        }
        public Bruch(string t)
        {
            string[] d = t.Split('/');
            z = Convert.ToInt32(d[0]);
            n = Convert.ToInt32(d[1]);
        }
        public static Bruch Mult1(Bruch b1, Bruch b2)
        {
            int zaehler = b1.z * b2.z;
            int nenner = b1.n * b2.n;

            //b1.z = zaehler;
            //b1.n = nenner;
            Bruch erg = new Bruch(zaehler, nenner);
            return erg;
        }
        public static Bruch Mult2(Bruch b1, Bruch b2)
        {
            return new Bruch(b1.z * b2.z, b1.n * b2.n);
        }
        public static Bruch Mult(Bruch b1, Bruch b2)
            => new Bruch(b1.z * b2.z, b1.n * b2.n);
        public static Bruch operator *(Bruch b1, Bruch b2)
            => new Bruch(b1.z * b2.z, b1.n * b2.n);

        public static explicit operator int(Bruch b)
            => b.z / b.n;
        public static implicit operator double(Bruch b)
            => (double)b.z / (double)b.n;
        public static implicit operator Bruch(int zahl)
            => new Bruch(zahl);


    }


    class Program
    {
        static void Main(string[] args)
        {
            Bruch b1 = new Bruch(2, 3);
            Bruch b2 = new Bruch(2);
            Bruch b3 = new Bruch("3/4");

            // Bruch e1 = 3.Mult(b1);
            Bruch e2 = Bruch.Mult(b1, b2);
            Bruch e3 = b1 * b2;
            Bruch e4 = b1 * 2;
            Bruch e5 = 2 * b1;
            // 2 --> impl.Konv. in einen Bruch
            // op* (Bruch, Bruch)

            int k = (int)e3;   // explizite Konvertierung
            double d = e3;      // implizite Konvertierung
            Console.WriteLine(k);
            Console.WriteLine(d);

            double d2 = 34;
            int k2 = (int)3.5;
        }
    }
}