using System;

public class Program

{

    public static void Main()

    {

            char[] a, b;

            string c, d, e, f, g, h, i, j;

            double k, l, m, n, o, p, q, r;

​

            a = new char[4];

            a[0] = '1';

            a[1] = '2';

            a[2] = '6';

            a[3] = '5';

​

            b = new char[4];

            b[0] = '2';

            b[1] = '5';

            b[2] = '1';

            b[3] = '5';

​

            //ke string

            c = Convert.ToString(a[0]);

            d = Convert.ToString(a[1]);

            e = Convert.ToString(a[2]);

            f = Convert.ToString(a[3]);

            g = Convert.ToString(b[0]);

            h = Convert.ToString(b[1]);

            i = Convert.ToString(b[2]);

            j = Convert.ToString(b[3]);

​

            k = Convert.ToDouble(c) / 7;

            l = Convert.ToDouble(d) / 7;

            m = Convert.ToDouble(e) / 7;

            n = Convert.ToDouble(f) / 7;

            o = Convert.ToDouble(g) / 7;

            p = Convert.ToDouble(h) / 7;

            q = Convert.ToDouble(i) / 7;

            r = Convert.ToDouble(j) / 7;

            Console.WriteLine("Perantara");

            Console.WriteLine();

            Console.WriteLine("Char to String");

            //convert char ke string

            Console.WriteLine(c);

            Console.WriteLine(d);

            Console.WriteLine(e);

            Console.WriteLine(f);

            Console.WriteLine(g);

            Console.WriteLine(h);

            Console.WriteLine(i);

            Console.WriteLine(j);

            Console.WriteLine();

            Console.WriteLine("String to Double");

            //convert string ke double

            Console.WriteLine(k);

            Console.WriteLine(l);

            Console.WriteLine(m);

            Console.WriteLine(n);

            Console.WriteLine(o);

            Console.WriteLine(p);

            Console.WriteLine(q);

            Console.WriteLine(r);

    }

}