public/subjects/order_books

order_books

Instructions

Build a module called library with two sub-modules inside of it:

• writers which contains a structure called Writer which has a first_name (String),a last_name (String) and a set of books (Vec<Book>).
• books which contains a structure called Book which has a title (String) and a year of publication (u64).

A function order_books also has to be created (outside the previous modules which receives a writer (Writer) and orders the set of books alphabetically.

Expected Functions and Structs

(The structs declarations need to be filled and added in the appropriate submodules)

pub struct Writer {

}

pub struct Book {

}

pub fn order_books(writer: &mut Writer) {

}

Example

Here is a program to test your function and structs:

pub use library::writers::Writer;
pub use library::books::Book;

fn main() {
    let mut writer_a = Writer {
        first_name: "William".to_string(),
        last_name: "Shakespeare".to_string(),
        books: vec![
            Book {
                title: "Hamlet".to_string(),
                year: 1600,
            },
            Book {
                title: "Othelo".to_string(),
                year: 1603,
            },
            Book {
                title: "Romeo and Juliet".to_string(),
                year: 1593,
            },
            Book {
                title: "MacBeth".to_string(),
                year: 1605,
            },
        ],
    };

    println!("Before ordering");
    for b in &writer_a.books {
        println!("{:?}", b.title);
    }

    order_books(&mut writer_a);

    println!("\nAfter ordering");
    for b in writer_a.books {
        println!("{:?}", b.title);
    }
}

And its output:

$ cargo run
Before ordering
"Hamlet"
"Othelo"
"Romeo and Juliet"
"MacBeth"

After ordering
"Hamlet"
"MacBeth"
"Othelo"
"Romeo and Juliet"
$