C# 写图书馆管理程序

代码较多，建议先参考文档，慢慢编写，有问题再讨论：https://blog.csdn.net/qq_42330141/article/details/102247326

using System;
using System.Text;
using System.Collections.Generic;
using System.IO;
using System.Text.RegularExpressions;
using static System.Math;
using System.Linq;
namespace ConsoleApp1
{
    public class Object {
        public string name { get; set; }
        public int no { get; set; }
        public Object() { }
        public Object(String na,int n) { name = na;no = n; }
        public void Show() { Console.Write("{0,-15}{1}", name, no); }
    }
    public class Book : Object
    {
        public string author { get; set; }
        public Book() { }
        public Book(String na, int n, String auth) : base(na, n)
        {
            author = auth;
        }
        public void ShowBook() { Console.Write("{0,-15}{1,-5}{2}", name, no, author); }
    }
    public class Reader : Object
    {
        public Book[] rent { get; set; }
        public int top { get; set; }
        public Reader()
        {
            top = 0;
            rent = new Book[5];
        }
        public Reader(String na, int n) : base(na, n)
        {
            top = 0;
            rent = new Book[5];
        }
        public void RentBook(Book b)
        {
            if (top > 4) throw new Exception("最多只能借5本哦~");
            rent[top] = b;
            top++;
        }
        public void ShowReader()
        {
            this.Show();
            Console.WriteLine();
            for (int i =0; i < top; i++)
            {
                rent[i].Show();
                Console.WriteLine();
            }
        }
    }
    class Program
    {
        static void Main(string[] cmd)
        {
            var b1 = new Book("书名1", 1, "作者1");
            var b2 = new Book("书名2", 2, "作者2");
            var r1 = new Reader("读者", 1);
            r1.RentBook(b1);
            r1.RentBook(b2);
            r1.ShowReader();


            Console.ReadKey();
        }
    }
}

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