홍대 자바 수업 원주 ,넓이 구하는거-C# 생성자 사용 ..

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

namespace ConsoleApplication1
{
    class CirTest
    {
        private double r;
        double temp;

        public CirTest(double a)
        {
            this.r = a;
        }
        public double setR(double a)
        {
            r = a;
            return r;
        }
        public double rCal()
        {
            temp = r * 6.28;
            return temp;
        }

        public double r2Cal()
        {
            temp = r * r * 3.14;
            return temp;
        }

    }


    class Circle
    {
        public static void Main(String[] args) 
	{
	   CirTest jh=new CirTest(10);
	 
       Console.WriteLine("넓이는"+jh.r2Cal());
	   Console.WriteLine("원주는"+jh.rCal());
	}
    }

}