using system;

​

namespace exam

{

    class QuarterExam

    {

        static void Main(string[] args)

        {

            int x = 10;

            int y = 20;

            int z;

            int a;

            int b;

            x++;

            Console.WriteLine("The value of x is {0}", x);

            y++;

            Console.WriteLine("The value of y is {0}", y);

            z = x + y;

            Console.WriteLine("The value of z is {0}", z);

            a = x;

            Console.WriteLine("The value of a is {0}", a);

            b = y;

            Console.WriteLine("The value of b is {0}", b);

        }

    }

}