using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace Lab7_4

{

    class Stock

    {

        public delegate void PriceRise(double money);     //定义委托

        public delegate void PriceDown(double money);

        public event PriceRise PriceRiseEvent;            //定义事件

        public event PriceDown PriceDownEvent;

        private string stockName;

        private double stockPrice;

        public string StockName {

            set;

            get;

        }

        public double StockPrice {

            set;

            get;

        }

        public Stock(string name, double price) {

            stockName = name; stockPrice = price;

        }

        public void priceRise(double up) {

            Console.WriteLine("股票上升: {0}", up);

            PriceRiseEvent(up);             //触发事件

        }

        public void priceDown(double down) {

            Console.WriteLine("股票下降: {0}", down);

            PriceDownEvent(down);

        }

    }

}

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace Lab7_4

{

    class Buyer

    {

        private Stock stock;           //卖家要抛售的股票

        public Buyer(Stock s) {

            stock = s;

        }

        public void StockPriceRise(double up) {

            if (up > 0.05) {

                Console.WriteLine("股票上涨已经超过5%, 买家谨慎买入");

            } else {

                Console.WriteLine("股票正在小幅上涨, 买家可以买入");

            }

        }

        public void StockPriceDown(double down) {

            if (down > 0.05) {

                Console.WriteLine("股票下跌已经超过0.05，买家可以逢低买入");

            } else {

                Console.WriteLine("股票正在小幅下跌，买家暂时请观望");

            }

        }

    }

}

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace Lab7_4

{

    class Seller

    {

        private Stock stock;           //卖家要抛售的股票

        public Seller(Stock s) {

            stock = s;

        }

        public void StockPriceRise(double up) {

            if (up > 0.05) {

                Console.WriteLine("股票上涨已经超过5%, 卖家请赶快抛售");

            } else {

                Console.WriteLine("股票正在小幅上涨, 卖家可以继续观望");

            }

        }

        public void StockPriceDown(double down) {

            if (down > 0.05) {

                Console.WriteLine("股票下跌已经超过0.05，卖家请逢低补仓");

            } else {

                Console.WriteLine("股票正在小幅下跌，卖家请谨慎操作");

            }

        }

    }

}

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace Lab7_4

{

    class Program

    {

        static void Main(string[] args) {

            Console.WriteLine("输入股票名: ");

            Stock stock = new Stock(Console.ReadLine(), );

            Buyer buyer = new Buyer(stock);

            Seller seller = new Seller(stock);

            //注册事件

            stock.PriceRiseEvent += buyer.StockPriceRise;

            stock.PriceDownEvent += buyer.StockPriceDown;

            stock.PriceRiseEvent += seller.StockPriceRise;

            stock.PriceDownEvent += seller.StockPriceDown;

            //触发事件

            Console.WriteLine("输入涨率: ");

            stock.priceRise(double.Parse(Console.ReadLine()));

            Console.WriteLine("输入降率: ");

            stock.priceDown(double.Parse(Console.ReadLine()));

        }

    }

}