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using System;

namespace _09TaskPerformance1_midterm
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hello World!");
        }


        double getCircleDiameter(double r)
        {
            return r * 2;
        }
    }

    struct Product
    {
        public Product(string code, string price, string desc)
        {
            string product_code = code,
            product_price = price,
            product_desc = desc;
        }
        public string product_code
        {
            get
            {  return product_code; }
            set
            { product_code = value; }
        }
        public string product_price
        {
            get
            { return product_price; }
            set
            { product_price = value; }
        }
        public string product_desc
        {
            get
            { return product_desc; }
            set
            { product_desc = value; }
        }
    }

    class Person
    {
        string full_name;
        public Person()
        {
            full_name = null;
        }
    }
}
namespace Account
{
    class Account
    {
        string account_number;
    }
}