three.cpp

文字界面的模拟书店系统

//comments
//change int in the menu to char or string...
//re-arrange the funcs in Book

#include <iostream>
#include <string>
#include <fstream>
#include <iomanip>
using namespace std;

class Book
{
	private:
		string title;
		int authorNum;
		string authors[4];
		string publisher;
		int year;
		string ISBN;
		double price;
		int stock;
	public:
		Book();
		Book(string,int,string,string,double,int,string,string = "",string = "",string = "");
		~Book();
		
		void setYear(int);
		void showYear();
		
		void setAN(int);
		void showAN();
		
		void showTitle();
		void setTitle(string);
		bool checkTitle(string);
		
		void showStock();
		void setStock(int);
		void updateStock(int);
		
		void showPublisher();
		void setPublisher(string);
		bool checkPublisher(string);
		
		void showISBN();
		void setISBN(string);
		bool checkISBN(string);
		
		void showPrice();
		void setPrice(double);
		void updatePrice(double);
		
		void showAuthor();
		void setAuthor(string="",string="",string="",string="");
		bool checkAuthor(string);

};

Book::Book()
{
	title = "";
	authorNum = 0;
	for(int i=0;i<4;++i)
	{
		authors[i] = "";
	}
	publisher = "";
	ISBN = "";
	price = 0.0;
	stock = 0;
}

Book::Book(string ti,int an,string pu,string is,double pr,int st,string au1,string au2,string au3,string au4)
{
	title = ti;
	authorNum = an;
	authors[0] = au1;
	authors[1] = au2;
	authors[2] = au3;
	authors[3] = au4;
	publisher = pu;
	ISBN = is;
	price = pr;
	stock = st;
}

Book::~Book()
{
	
}

void Book::setAN(int i)
{
	authorNum = i;
}

void Book::showPrice()
{
	cout << "The price is: " << fixed << setprecision(2) << price << endl;
}

void Book::showStock()
{
	cout << "The quantities in stock is: " << stock << endl;
}

void Book::showAN()
{
	cout << "The number of authors is: " << authorNum << endl;
}

void Book::showYear()
{
	cout << "The year of publication is: " << year << endl;
}

void Book::setYear(int i)
{
	year = i;
}

bool Book::checkAuthor(string s)
{
	for(int i=0;i<authorNum;++i)
	{
		if(s.compare(authors[i]) == 0)
			return true;
	}
	return false;
}

void Book::setAuthor(string a,string b,string c,string d)
{
	authors[0] = a;
	authors[1] = b;
	authors[2] = c;
	authors[3] = d;
}

void Book::showAuthor()
{
	if(authorNum > 1)
		cout << "The authors are: \n";
	else
		cout << "The author is: ";
		
	for(int i=0;i<authorNum;++i)
	{
		cout << '\t' << authors[i] << endl;
	}
}

void Book::updatePrice(double d)
{
	price += d;
}

void Book::setPrice(double d)
{
	price = d;
}

void Book::showISBN()
{
	cout << "The ISBN is: " << ISBN << endl;
}

void Book::setISBN(string s)
{
	ISBN = s;
}

bool Book::checkISBN(string s)
{
	if(s.compare(0,s.size(),ISBN,0,ISBN.size()-1) == 0)
	{
		return true;
	}
	else
	{
		return false;
	}
}

void Book::showPublisher()
{
	cout << "The publisher is: " << publisher << endl;
}

void Book::setPublisher(string s)
{
	publisher = s;
}

bool Book::checkPublisher(string s)
{
	if(s == publisher)
		return true;
	else
		return false;
}

void Book::updateStock(int i)
{
	stock += i;
}

void Book::setStock(int i)
{
	stock = i;
}

void Book::showTitle()
{
	cout << "The title is: " << title << endl;
}

void Book::setTitle(string s)
{
	title = s;
}

bool Book::checkTitle(string s)
{
	if(s.compare(0,s.size(),title,0,title.size()-1) == 0)
		return true;
	else
		return false;
}
/////////////////////////////////

class BookStore
{
	private:
		Book books[100];
		int no;
	public:
		BookStore(char[]);
		void eventLoop();
		void menu();
		void printAll();
		void printList();
		void printISBN();
		int search();
		int searchISBN();
		int searchTitle();
		void update();
		
};

BookStore::BookStore(char ch[])
{
	ifstream fin;
	string ti,is,pu,au[4];
	int ye,st,an;
	double pr;
	
	for(int i=0;i<4;++i)
	{
		au[i] = "";
	}
	
	fin.open(ch);
	
	if(fin.good())
	{
		fin >> no;
		fin.ignore(1,'\n');

		for(int i=0;i<no;++i)
		{
			getline(fin,ti,'\n');
			getline(fin,is,'\n');
			getline(fin,pu,'\n');
			fin >> ye;
			fin.ignore(1,'\n');
			fin >> pr;
			fin.ignore(1,'\n');
			fin >> st;
			fin.ignore(1,'\n');
			fin >> an;
			fin.ignore(1,'\n');
			for(int j=0;j<an;++j)
			{
				getline(fin,au[j],'\n');
			}
			books[i].setTitle(ti);
			books[i].setISBN(is);
			books[i].setPublisher(pu);
			books[i].setYear(ye);
			books[i].setPrice(pr);
			books[i].setStock(st);
			books[i].setAN(an);
			books[i].setAuthor(au[0],au[1],au[2],au[3]);
			
		}
	}
	else
	{
		cerr << "Can't open the file.\n";
		exit(1);
	}
	fin.close();
}

void BookStore::menu()
{
	cout << "Welcome to Rock's Book Store\n";
	cout << "To make a selection enter the number and press enter\n";
	cout << "1: Print a list of books\n";
	cout << "2: Print a list of books and ISBN numbers\n";
	cout << "3: To see if a book in store\n";
	cout << "4: To update the number of copies of a book\n";
	cout << "5: To print books data\n";
	cout << "9: Exit the program.\n";
}

void BookStore::printList()
{
	for(int i=0;i<no;++i)
	{
		books[i].showTitle();
	}
	cout << endl;
}

void BookStore::printISBN()
{
	for(int i=0;i<no;++i)
	{
		books[i].showTitle();
		books[i].showISBN();
		cout << endl;
	}
	
}

int BookStore::search()
{
	int com,index = -1;
	
	cout << "Enter\n";
	cout << "1: To search the book by ISBN\n";
	cout << "2: To search the book by title\n";
	
	cin >> com;
	
	if(com == 1)
	{
		index = searchISBN();
	}
	else if(com == 2)
	{
		index = searchTitle();
	}
	else
	{
		cerr << "Illegal command.\n";
	}
	return index;
}

int BookStore::searchISBN()
{
	string s;
	int i = 0;
	
	cout << "Enter the ISBN of the book.\n";
	cin.ignore(1,'\n');
	getline(cin,s,'\n');
	
	while(i<no)
	{
		if(books[i].checkISBN(s))
		{
			cout << "The store sells this book.\n";
			return i;
		}
		i++;
	}
	
	if(i == no)
	{
		cout << "The store does not sell this book.\n";
	}
	
	return i;
}

int BookStore::searchTitle()
{
	string s;
	int i = 0;
		
	cout << "Enter the title of the book.\n";
	cin.ignore(1,'\n');
	getline(cin,s,'\n');
	
	while(i<no)
	{
		if(books[i].checkTitle(s))
		{
			cout << "The store sells this book.\n";
			return i;
		}
		i++;
	}
	
	if(i == no)
	{
		cout << "The store does not sell this book.\n";
	}
	
	return i;
}

void BookStore::update()
{
	int index,num;
	index = search();
	
	if(index == no)
		cout << "Can't do that.\n";
	else
	{
		cout << "Enter the number of copies of a book: ";
		cin >> num;
		
		books[index].updateStock(num);
	}
}

void BookStore::printAll()
{

	for(int i=0;i<no;++i)
	{
		books[i].showTitle();
		books[i].showISBN();
		books[i].showPublisher();
		books[i].showYear();
		books[i].showAN();
		books[i].showAuthor();
		books[i].showPrice();
		books[i].showStock();
		cout << endl;
	}
	
}

void BookStore::eventLoop()
{
	int command;

	do
	{
		menu();
		
		cin >> command;
		
		switch(command)
		{
			case 1:
				printList();
				break;
			case 2:
				printISBN();
				break;
			case 3:
				search();
				break;
			case 4:
				update();
				break;
			case 5:
				printAll();
				break;
			case 9:
				break;
			default:
				cerr << "Illegal command.\n";
		}
	}while(command != 9);
}


int main()
{
	char datafile[] = "bookData.txt";
	BookStore bookStore(datafile);
	bookStore.eventLoop();
	
	return 0;
}