#include <time.h>
#include <iostream>
#include <string>
#include <iomanip>
#define MAXSIZE 10000
using namespace std;

//全局变量
static int Bcount = 2;
static int flag = 0;

class Book
{
private:
	string ISBN;
	string Bname;
	double price;
	string author;
public:
	Book() {};
	Book(string is, string nam, double p, string au)
	{
		ISBN = is;
		Bname = nam;
		price = p;
		author = au;
	}
	friend ostream& operator<<(ostream& output, const Book& b);
	string getISBN() const { return ISBN; }
	string getName() const { return  Bname; }
	string getAuthor() const { return author; }
	double getPrice() const { return price; }
	void modISBN(string i) { ISBN = i; }
	void modName(string n) { Bname = n; }
	void modPrice(double pr) { price = pr; }
	void modAuthor(string au) { author = au; }
};

//输出流运算符重载
ostream& operator<<(ostream& output, const Book& b)
{
	cout.setf(ios_base::left);
	output << b.getISBN()<<"\t"<<b.getName() << "\t" << b.getAuthor() << "\t" << b.getPrice() << "\t" << endl;
	return output;
}
//预置书籍类数据
Book Books[MAXSIZE] = {
	Book("9787302257646","程序设计基础",25,"张三"),
	Book("9787302219972","操作系统原理",32,"李四")
};

class Admin
{
public:
	Admin() {};
	void AddBook();
	void DelBook();
	void SearchBook();
	void modify();
};
//输出所有Book
void BooksPrint()
{
	cout << "———————— 书籍信息 ————————" << endl;
	cout << "序号\tISBN\t\t书名\t\t作者\t价格" << endl;
	for (int i = 0; i < Bcount; i++) cout << i + 1 << "\t" << Books[i];
	cout << endl;
}

//添加新书籍
void NewBook()
{
	string ISBN;
	string Bname;
	double price;
	string author;
	cout << "------------------------------------------" << endl;
	cout << "正在添加新的书籍信息，当前已有书籍数目:" << Bcount << endl;
	cout << "输入ISBN号："; cin >> ISBN;
	cout << "请输入书名："; cin >> Bname;
	cout << "请输入价格："; cin >> price;
	cout << "请输入作者名："; cin >> author;
	Books[Bcount] = Book(ISBN, Bname, price, author);
	Bcount++;
	cout << "添加成功！" << endl;
}
//增加书刊
void Admin::AddBook()
{
	int select = 1;
	cout << setw(20) << ">>>>>>>>>>增加书刊<<<<<<<<<<" << endl;
	while (select)
	{
		NewBook();
		cout << "输入0退出该操作，输入其他数字继续添加。" << endl << "请输入：";
		cin >> select;
	}
}

//删除书刊 
void Admin::DelBook()
{
	string s = "1";
	while (1) {
		cout << "请输入作者名、书名或ISBN号（输入0返回主菜单）：";
		cin >> s;
		if (s == "0") break;									//退出判断
		int flag = 0;										//查找成功状态符
		//查找书籍类
		for (int i = 0; i < Bcount; i++)
			if (Books[i].getAuthor() == s || Books[i].getISBN() == s || Books[i].getName() == s)
			{
				flag = 1;
				cout << "发现目标书籍如下，是否删除该书籍信息？（Y 是 / N 否）"
					<< endl << "------------------------"
					<< endl << Books[i] << "------------------------" << endl << "请选择：";
				char c; cin >> c;
				if (c == 'Y' || c == 'y')
				{
					for (int j = i; j < Bcount - 1; j++)
					{
						Books[j] = Books[j + 1];
					}
					Bcount--;
				}
				else continue;
			}
			else continue;
		if (flag) cout << "删除成功！" << endl;
		else cerr << "未找到目标书籍。" << endl;
	}
}
//修改书籍类
void modifyBook()
{
	int select = 1;
	BooksPrint();
	int a, b;
	string s = "";
	double pr = 0;
	cout << "要操作的书籍编号是："; cin >> a;
	if (a<1 || a>Bcount)
	{
		cerr << "序号错误，请检查。" << endl;
	}
	else
	{
		cout << "1.ISBN\t2.书籍名称\t3.作者\t4.价格\t0.放弃修改" << endl << "要修改的信息是："; cin >> b;
		switch (b)
		{
		case 1: cout << "输入修改后的信息："; cin >> s; Books[a - 1].modISBN(s); cout << Books[a - 1] << "修改成功！" << endl; break;
		case 2: cout << "输入修改后的信息："; cin >> s; Books[a - 1].modName(s); cout << Books[a - 1] << "修改成功！" << endl; break;
		case 3: cout << "输入修改后的信息："; cin >> s; Books[a - 1].modAuthor(s); cout << Books[a - 1] << "修改成功！" << endl; break;
		case 4: cout << "输入修改后的信息："; cin >> pr; Books[a - 1].modPrice(pr); cout << Books[a - 1] << "修改成功！" << endl; break;
		case 0: break;
		}
	}
}
//修改书籍信息
void Admin::modify()
{
	int select = 1;
	cout << setw(20) << ">>>>>>>>>>修改书刊信息<<<<<<<<<<" << endl;
	while (select)
	{
		modifyBook(); 
		cout << "输入 0 退出该操作，输入其他数字继续修改" << endl << "请输入：";
		cin >> select;
	}
}

//运行中函数
void MainLoop()
{
	Admin admin;
	int select = 1;
	while (select)
	{
		cout <<  "==============================="
			<< endl << "====欢迎使用图书管理系统===="
			<< endl << "===============================" << endl
			<< setw(20) << "————————————————" << endl
			<< "1.增加书刊信息" << endl
			<< "2.修改书刊信息" << endl
			<< "3.删除书刊信息" << endl
			<< "4.查看所有图书" << endl
			<< "0.退出书店系统" << endl
			<< setw(20) << "————————————————" << endl;
		cout << "请输入操作序号：";
		cin >> select;
		if (select < 0 || select >4)
		{
			cerr << "非法值，请重新输入。" << endl;
			continue;
		}
		else
		{
			switch (select)
			{
			case 1: admin.AddBook(); continue;
			case 2: admin.modify(); continue;
			case 3: admin.DelBook(); continue;
			case 4:	BooksPrint(); continue;
			case 0: break;
			}
		}
	}
}
//主函数
int main()
{	
	MainLoop();
	return 0;
}