Hi there I have a problem in writing codes for books class my question is–

The Main Test Program The main function should: Declare an object of type Book Prompt the user for all property values for the book (all values should be stored in local variables declared in the main function).
Call the appropriate methods to set the Book's private data members Prompt the user for the number of books to be added to inventory. If the value entered is less than or equal to zero, continue to prompt the user for a value until the value is valid. Prompt the user for the number of books to remove from inventory. If the value entered is less than or equal to zero, continue to prompt the user for a value until the value is valid. If a „false‟ is returned from this function call, display an error message that the number of books exceeds the amount in inventory. Call the appropriate methods to display each of the properties of the book.
The class must contain the following private data members:
o Title (string)
o Author (string)
o ISBN (string)
o Publication year (integer)
o Publisher (string)
o Copies in inventory (integer)

so far I have done that my header file is here


Now I am confuse in how write the code for adding and removing books from inventory (If the value entered is less than or equal to zero, continue to prompt the user for a value until the value is valid. Prompt the user for the number of books to remove from inventory. If the value entered is less than or equal to zero, continue to prompt the user for a value until the value is valid. If a „false‟ is returned from this function call, display an error message that the number of books exceeds the amount in inventory.)

Several corrections:

• The keywords class, public, private have a specific case. The first letter cannot be capitalized & still denote these keywords.
• Variable names such "copies in inventory" are not syntactically correct as spaces cannot be used within the name itself. Either concatenate all words together, or use underscores as a substitution.
• Member function names cannot have spaces for the same reason.
• When posting code, please place a [cpp] tag before, & [/cpp] afterwards such that the code will be formatted. Indentation will be preserved, & you will be making life simpler for readers who you are hoping will spend their time on answering your questions.

You may want to consider creating an array of type BOOK which will contain all books which have been entered thus far. If you use an array, you will need to ensure that the array is large enough to hold all anticipated books. You will also need to include code to stop insertions past the end of the array.

Creating a linked list would accomplish the same thing, plus not be constrained by the array size. You may or may not have covered this subject yet.

As for removal, you have get & set member functions which are used to initialize each book. When the copies in inventory reaches zero, set the title, author, etc. to empty strings.