Based on UML diagram, write a full program to implement the concept of aggregation classes. The program should produce an output as shown in Figure 1. MailMessage - Header header - Body bd Attachment atc + MailMessage() + string toString() MailMessage - filename : string Header Body - title : String + string getTitle () message : String + string getMessage () string getAttachment() Header: Programming Technique II Body: Lab Exercises for Aggregation Attachment: Labl1.cpp Figure 1: The program output

C++

In C++ Create a new project named lab8_1. You will be implementing two classes: A Book class, and a Bookshelf class. The Bookshelf has a Book object (actually 3 of them). You will be able to choose what Book to place in each Bookshelf.  Here are their UML diagrams  Book class UML Book - author  : string- title   : string- id      : int- count   : static int + Book()+ Book(string, string)+ setAuthor(string) : void+ setTitle(string) : void+ print() : void+ setID() : void And the Bookshelf class UML Bookshelf - book1 : Book- book2 : Book- book3 : Book + Bookshelf()+ Bookshelf(Book, Book, Book)+ setBook1(Book) : void+ setBook2(Book) : void+ setBook3(Book) : void+ print() : void Some additional information: The Book class also has two constructors, which again offer the option of declaring a Book object with an author and title, or using the default constructor to set the author and title later, via the setters . The Book class will have a static member variable…

The class definition for an Item is given in the image UML diagram below Note: getInfo() returns a string containing ALL of the state information neatly organized. Part 1:  Create a class based on the specification above. Reminder:  – means private and +  means public. Part 2:  a)Write a function/method called “addItem” that takes: An array of items The number of items in the array An integer representing a barcode A string representing the name of an item A string representing the description of an item A double value representing the price   The function must create and add the item to the array if there is space. The function must return “true” if the addition was successful and “false” otherwise.   b)Write a function/method called “listItems” that takes: An array of items The number of items in the array The function must return a string containing the information on each item in the array.   c)Write a function called “pricelookup” that takes : An array of items The number of…