C# 21.03.22.과제 11

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

namespace Homework1234
{
    public class App
    {        
        public App()
        {
            Console.WriteLine("App");

            SCV scv = new SCV();
            scv.mineComplete = this.MineComplete;

            scv.MineMineral();
        }
        
        private void MineComplete()
        {
            Console.WriteLine("미네랄 +8");
        }
    }
}

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

namespace Homework1234
{
    class SCV
    {
        public Action mineComplete;
        public SCV()
        {

        }

        public void MineMineral()
        {
            Console.WriteLine("SCV가 미네랄을 캡니다.");
            Thread.Sleep(2000);

            this.mineComplete();
        }
    }
}

2초뒤에 미네랄이 올라간다. 찍기 힘들어서 사진으로 올림.

================================================

 

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

namespace Homework1234
{
    public class App
    {        
        public App()
        {
            BookDB bookDB = new BookDB();
            bookDB.AddBook("무소유", 12000, true);
            bookDB.AddBook("이것이 C#이다", 17500, true);
            bookDB.AddBook("반지의 제왕", 14000, false);

            bookDB.ProcessBooks(true, PrintTitle);

            PriceTotaller totaller = new PriceTotaller();
            bookDB.ProcessBooks(true, totaller.AddBookToTotal);
            Console.WriteLine("{0}, {1}", totaller.CountBooks, totaller.PriceBooks);

            bookDB.FindBookByName("해리포터", FoundBook);
        }
        
        public void FoundBook(string title)
        {
            if (string.IsNullOrEmpty(title))
            {
                Console.WriteLine("책을 찾을 수 없습니다.");
            }
            else
            {
                Console.WriteLine("{0}을 찾았습니다.", title);
            }
        }

        public void PrintTitle(Book book)
        {
            Console.WriteLine("{0}, {1}, {2}", book.title, book.price, book.paperback);
        }


    }
}

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

namespace Homework1234
{
    class PriceTotaller
    {
        public int CountBooks
        {
            get; private set;
        }
        public int PriceBooks
        {
            get; private set;
        }
        public PriceTotaller()
        {

        }


        public void AddBookToTotal(Book book)
        {
            this.CountBooks += 1;
            this.PriceBooks += book.price;
        }
    }
}

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

namespace Homework1234
{
   public struct Book
    {
        public string title;
        public int price;
        public bool paperback;
        public Book(string title, int price, bool paperback)
        {
            this.title = title;
            this.price = price;
            this.paperback = paperback;
        }
    }
}

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

namespace Homework1234
{
    public delegate void ProcessBookCallback(Book book);
    public class BookDB
    {
        private List<Book> list;       

        public BookDB()
        {
            this.list = new List<Book>();
        }

        public void AddBook(string title, int price, bool paperback)
        {
            Book book = new Book(title, price, paperback);
            this.list.Add(book);
        }

        public void ProcessBooks(bool paperback, ProcessBookCallback callback)
        {
            foreach(Book book in list)
            {
                if(book.paperback == paperback)
                {
                    callback(book);
                }
            }
        }

        public void FindBookByName(string title, Action<string> callback)
        {
            foreach(Book book in list)
            {
                if(book.title == title)
                {
                    callback(book.title);
                    return;
                }
            }
            callback(string.Empty);
        }
	}    
}

어려워서 한번 더 함