//razor - hàm chi cho phép update so luong sach = 0
//vi thong tin sach con duoc dung trong thong tin hoa don
public static void deleteBook(Book bookinfo)
{
int book_index = MyBookStore.findIndex(bookinfo.bookID);
MyBookStore.mybs[book_index].bookQty = 0;
bookinfo.bookQty = 0;
Bookrw.Bookupdate(bookinfo, book_index);
}
//razor - hàm cho phép chỉnh sửa thông tin sách theo mã sách
public static void updateBook(Book bookinfo)
{
//get lib index of the candidate book for modifying
int book_index = MyBookStore.findIndex(bookinfo.bookID);
MyBookStore.mybs[book_index].bookName = bookinfo.bookName;
MyBookStore.mybs[book_index].bookPublisher = bookinfo.bookPublisher;
MyBookStore.mybs[book_index].bookYear = bookinfo.bookYear;
MyBookStore.mybs[book_index].bookCat = bookinfo.bookCat;
MyBookStore.mybs[book_index].bookQty = bookinfo.bookQty;
MyBookStore.mybs[book_index].bookPriceTag = bookinfo.bookPriceTag;
MyBookStore.mybs[book_index].bookQty = bookinfo.bookQty;
Bookrw.Bookupdate(bookinfo, book_index);
}