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

namespace laibery
{
   public class CardIndex
    {
        public CardIndex(string book, string writer, string price, string quantity)
        {
            this.book = book;
            this.writer = writer;
            this.price = double.Parse(price);
            this.quantity = int.Parse(quantity);
        }
        public string book
        {
           private set;
            get;
        }

        public string writer
        {
            private set;
            get;
        }

        public double price
        {
           private set;
            get;
        }
        public int quantity
        {
            private set;
            get;
        }
    }
}