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

namespace ConsoleApplication67
{
    class Program
    {
        static void Main(string[] args)
        {
            MyClass obj = new MyClass(3, 7);
            obj.ShowValues();

            MyClass obj2 = new MyClass(15);
            obj2.ShowValues();
        }
    }

    class MyClass
    {
        private int x;
        private int y;

        public MyClass(int x)
            :this(x, 3)
        {

        }

        public MyClass(int x, int y)
        {
            this.x = x;
            this.y = y;
        }

        public void ShowValues()
        {
            Console.WriteLine("x = {0}, y = {1}", x, y);
        }
    }
}