using System;

namespace ConsoleApp2
{
    class Program
    {


        class sw_class
        {
            private int x;//グローバルクラス変数1
            private int y;//グローバルクラス変数2

            public sw_class(int x1, int y1)
            {
                this.x = x1;
                this.y = y1;
            }

            public void swap()
            {
                int x_save = 0;
                x_save = this.x;
                this.x = this.y;
                this.y = x_save;
                return;
            }

            public void sw_show()
            {
                Console.WriteLine("(x={0},y={1})を表示します。", x, y);
                return;
            }
        }

        static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");
            sw_class w1 = new sw_class(10,5);
            w1.sw_show();
            w1.swap();
            w1.sw_show();
            w1.swap();
            w1.sw_show();

        }
    }
}