Modify Listing 16.9 (vect3.cpp) as follows:

Here’s a sample run of the program in Listing 16.9:
Enter book title (quit to quit): The Cat Who Can Teach You Weight Loss
Enter book rating: 8
Enter book title (quit to quit): The Dogs of Dharma
Enter book rating: 6
Enter book title (quit to quit): The Wimps of Wonk
Enter book rating: 3
Enter book title (quit to quit): Farewell and Delete
Enter book rating: 7

Enter book title (quit to quit): quit
Thank you. You entered the following 4 ratings:
Rating Book
8 The Cat Who Can Teach You Weight Loss
6 The Dogs of Dharma
3 The Wimps of Wonk
7 Farewell and Delete
Sorted by title:
Rating Book
7 Farewell and Delete
8 The Cat Who Can Teach You Weight Loss
6 The Dogs of Dharma
3 The Wimps of Wonk
Sorted by rating:
Rating Book
3 The Wimps of Wonk
6 The Dogs of Dharma
7 Farewell and Delete
8 The Cat Who Can Teach You Weight Loss
After shuffling:
Rating Book
7 Farewell and Delete
3 The Wimps of Wonk
6 The Dogs of Dharma
8 The Cat Who Can Teach You Weight Loss
Bye.

a. Add a price member to the Review structure.b. Instead of using a vector of Review objects to hold the input, use a vector of shared_ptr objects. Remember that a shared_ptr has to be initialized with a pointer returned by new.
c. Follow the input stage with a loop that allows the user the following options for displaying books: in original order, in alphabetical order, in order of increasing ratings, in order of decreasing ratings, in order of increasing price, in order of decreasing price, and quitting.

Here’s one possible approach. After getting the initial input, create another vector of shared_ptrs initialized to the original array. Define an operator<() function that compares pointed-to structures and use it to sort the second vector so that the shared_ptrs are in the order of the book names stored in the pointed-to objects. Repeat the process to get vectors of shared_ptrs sorted by rating and by price. Note that rbegin() and rend() save you the trouble of also creating vectors of reversed order.

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Listing 16.9 vect3.cpp // vect3.cpp - using STL functions #include #include