Constructors

Unlike other programming languages, Rust doesn't have a built-in constructor keyword to construct instances of a struct. Instead, you can directly create an instance of a struct simply by calling the struct's name and passing the required values.

struct Post {
    pub content: String,
    pub user: String,
    pub views: u32
}
 
fn main(){
    let new_blog_post = Post {
        content: "Some content".to_string(),
        user: "Jon Doe".to_string(),
        views: 0
    };
}

However, this pattern is discouraged, in real-life scenarios, we might not want to expose all fields with pub or some fields will have default values that it would be repetitive to provide the value for every new instance, instead.

In Rust we have a convention, constructors are implemented as associated functions named new. They encapsulate the initialization of the struct, ensuring that instances are always created in a valid state.

For example, for the Post struct above, we can have a default value for the views to always be 0 for new instances.

impl Post {
    pub fn new(content: String, user: String) -> Post {
        Post {
            content,
            user,
            views: 0
        }
    }
}
 
fn main(){
    let new_blog_post = Post::new(
        "Some content".to_string(),
        "Jon Doe".to_string()
    );
}

Your Task

In this challenge, you will implement a constructor for a struct that represents a Book. A Book will have the following fields:

title: A string that represents the book's title.
author: A string that represents the book's author.
year: An integer that represents the year the book was published.
likes: An integer that represents the number of likes the book has received. Default value is 0.

The constructor function, Book::new, should take three parameters (title, author, and year) and return a fully initialized Book.

Requirements

Implement a constructor function Book::new that:
- Takes three arguments: title: &str, author: &str, and year (integer).
- Returns a Book instance with the specified values and default likes value of 0.
Remember to use pub for fields (required for testing).

Example Test

let book = Book::new(
    "ASOIAF",
    "George R. R. Martin",
    1996
);
 
assert_eq!(book.title, "ASOIAF");
assert_eq!(book.author, "George R. R. Martin");
assert_eq!(book.year, 1996);
assert_eq!(book.likes, 0);

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Solutions

mwheeleraus

16 hours ago

3.50ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: isize,
    pub likes: isize
}
impl Book {
    // 2. Define the `new` associated function
   pub fn new(title: &str, author: &str , year: isize) -> Book {
            Book {
                title: String::from(title),
                author: String::from(author),
                year,
                likes: 0,
            }       
    }
}

Piotr Baranowski

piotrbar250

20 hours ago

3.67ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: i32,
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Book {
        Book {title: String::from(title), author: author.to_string(), year, likes: 0}
    }
}

Eliettetheegeek

a day ago

3.76ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    pub title : String,
    pub author : String,
    pub year : i32,
    pub likes : i32,
    // Make all of them public with `pub`
    // Read the description for the fields
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new (title: &str, author : &str, year: i32) -> Self {
        Book {
            title: title.to_string(),
            author: author.to_string(),
            year,
            likes: 0,
        }
    }
}

PreppyMiguel

lusuo9

a day ago

3.78ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: i32,
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Self{
        Book {
            title: String::from(title),
            author: String::from(author),
            year,
            likes: 0
        }
    }
}

PreppyMiguel

lusuo9

a day ago

3.76ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: i32,
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Book{
        Book {
            title: String::from(title),
            author: String::from(author),
            year,
            likes: 0
        }
    }
}

Tristan1435

a day ago

3.65ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: u32,
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Book {
        Book {
            title: title.to_string(),
            author: author.to_string(),
            year,
            likes: 0
        }
    }
}

Hariom

om-secadvice

2 days ago

4.26ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i16,
    pub likes: i16
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i16) -> Book {
        Book {
            title: title.into(),
            author: author.into(),
            year: year,
            likes: 0
        }
    }
}

khadre07

3 days ago

3.97ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: u8
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Self {
        return Self {
            title: title.to_string(),
            author: author.to_string(), 
            year: year,
            likes: 0
        };
    }
}

DjukicDragan01

4 days ago

5.10ms

89.32kb

pub struct Book {
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: u32,
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Self {
        Self {
            title: title.to_string(),
            author: author.to_string(),
            year,
            likes: 0
        }
    }
}

DjukicDragan01

4 days ago

3.74ms

89.32kb

pub struct Book {
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: u32,
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Self {
        Self {
            title: title.to_string(),
            author: author.to_string(),
            year,
            likes: 0
        }
    }
}

azmahflameheart

4 days ago

3.51ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: i32
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Self {
        Self {
            title: title.into(),
            author: author.into(),
            year,
            likes: 0
        }
    }
}

Kourosh Mozafari

kmozafari

4 days ago

3.79ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i16,
    pub likes: i16 
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i16)-> Book{
        Book {
            title : title.to_string(),
            author : author.to_string(),
            year,
            likes: 0
        }
    }
}

Álex Frías

alexwebdev05

4 days ago

3.90ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: i32
    // Read the description for the fields
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Book {
        Book {
            title: title.to_string(),
            author: author.to_string(),
            year,
            likes: 0
        }
    }
}

Sukemcute

4 days ago

4.50ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: i32,
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Book {
        Book {
            title: title.to_string(),
            author: author.to_string(),
            year,
            likes:0
        }
    }
}

Vendra000

4 days ago

3.83ms

89.32kb

pub struct Book {
    pub title: String,
    pub author: String,
    pub year: i16,
    pub likes: i32
}
impl Book {
    pub fn new(t: &str, a: &str, y: i16) -> Book {
        Book{
            title: t.to_string(),
            author: a.to_string(),
            year: y,
            likes: 0
        }
    }
}

arameop

5 days ago

4.90ms

89.32kb

pub struct Book {
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: i32, // 1. Define the fields of the struct
                    // Make all of them public with `pub`
                    // Read the description for the fields
}
impl Book {
    pub fn new(title: &str, author: &str, year: i32) -> Book {
        Book {
            title: title.to_string(),
            author: author.to_string(),
            year,
            likes: 0,
        }
    } // 2. Define the `new` associated function
}

emiludenz

5 days ago

3.96ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: i32,
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Book {
        return Book {
            title: title.to_string(),
            author: author.to_string(),
            year,
            likes: 0,
        };
    }
}

Egu0

egu0

5 days ago

3.48ms

89.32kb

pub struct Book {
    pub title: String,
    pub author: String,
    pub year: i16,
    pub likes: u32,
}
impl Book {
    pub fn new(title: &str, author: &str, year: i16) -> Book {
        Book {
            title: title.to_string(),
            author: author.to_string(),
            year,
            likes: 0,
        }
    }
}

LawisChen

6 days ago

3.70ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: i32,
}
impl Book {
    pub fn new(title: &str, author: &str, year: i32) -> Book {
        Book {
            title: title.to_string(),
            author: author.to_string(),
            year,
            likes: 0,
        }
    }
}

Martin Guerra

mguerra77

6 days ago

3.35ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: i32,
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Book {
        Self{
            title: title.to_string(),
            author: author.to_string(),
            year: year,
            likes: 0
        }
    }
}

Özgür

AyikOzgur

6 days ago

3.80ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: i32,
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Self {
        Self {
            title: title.to_string(),
            author: author.to_string(),
            year: year,
            likes: 0
        }
    }
}

murdurn

7 days ago

3.72ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: u32,
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Book {
        Book {
            title: String::from(title),
            author: String::from(author),
            year,
            likes: 0
        }
    }
}

Alexey Lisov

BaldiSlayer

7 days ago

3.92ms

89.32kb

pub struct Book {
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: i32,
}
impl Book {
    pub fn new(title: &str, author: &str, year: i32) -> Book {
        Book {
            title: title.to_string(),
            author: author.to_string(),
            year: year,
            likes: 0 as i32,
        }
    }
}

Yuki Nagase

nonanne

7 days ago

4.35ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: u32,
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Book{
        Book{
            title : title.to_string(),
            author : author.to_string(),
            year,
            likes:0,
        }
    }
}

Marouan Boulahtouf

MBoulahtouf

7 days ago

3.76ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i16,
    pub likes: i32,
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i16) -> Self {
        Book {
            title: String::from(title),
            author: String::from(author),
            year,
            likes: 0,
        }
    }
}

Marouan Boulahtouf

MBoulahtouf

7 days ago

3.94ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: i32,
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Self {
        Book {
            title: String::from(title),
            author: String::from(author),
            year,
            likes: 0,
        }
    }
}

ffrie

7 days ago

4.82ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: i32,
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Book {
        Book{
            title: title.to_string(),
            author: author.to_string(),
            year,
            likes: 0
        }
    }
}

Ramon Silva

rsilva1

8 days ago

3.82ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: i32, 
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Book {
        Book {
            title: title.to_string(),
            author: author.to_string(),
            year, 
            likes: 0,
        }
    }
}

aureliothuerch

8 days ago

4.19ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: u32,
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Book {
        Book {
            title: title.to_string(),
            author: author.to_string(),
            year,
            likes: 0,
        }
    }
}

nbarbier-amira

8 days ago

3.59ms

89.32kb

pub struct Book {
    pub title: String,
    pub author: String,
    pub year: i16,
    pub likes: u32,
}
impl Book {
    pub fn new(title: &str, author: &str, year: i16) -> Book {
        Book {
            title: title.to_string(),
            author: author.to_string(),
            year: year,
            likes: 0,
        }
    }
}

Anthony Young

A-Young-Git

9 days ago

3.60ms

89.32kb

pub struct Book {
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: i32,
}
impl Book {
    pub fn new(title: &str, author: &str, year: i32) -> Self {
        Self {
            title: title.to_string(),
            author: author.to_string(), 
            year: year,
            likes: 0,
        }
    }
}

Timmy

sha2dow4

9 days ago

3.70ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: i32,
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Self {
        Self{
            title: title.to_string(),
            author: author.to_string(),
            year: year,
            likes: 0,
        }
    }
}

Dani-Drk

10 days ago

3.72ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: u32,
    // Make all of them public with `pub`
    // Read the description for the fields
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32)-> Self {
        Self {
            title: title.to_string(),
            author:author.to_string(),
            year,
            likes: 0,
        }
    }
}

Dani-Drk

10 days ago

3.71ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: u32,
    // Make all of them public with `pub`
    // Read the description for the fields
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32)-> Self {
        Book {
            title: title.to_string(),
            author:author.to_string(),
            year,
            likes: 0,
        }
    }
}

Snoweuph

snoweuph

10 days ago

3.55ms

89.32kb

pub struct Book {
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: usize,
}
impl Book {
    pub fn new(title: &str, author: &str, year: i32) -> Self {
        Self {
            title: title.into(),
            author: author.into(),
            year,
            likes: 0,
        }
    }
}

penmanglewood

10 days ago

3.95ms

89.25kb

pub struct Book<'a> {
    pub title: &'a str,
    pub author: &'a str,
    pub year: i32,
    pub likes: i32,
}
impl<'a> Book<'a> {
    pub fn new(title: &'a str, author: &'a str, year: i32) -> Self {
        Self {
        title,
        author,
        year,
        likes: 0,
        }
    }
}

winter

winter-08

11 days ago

3.87ms

89.32kb

pub struct Book {
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: i32,
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
}
impl Book {
    pub fn new(title: &str, author: &str, year: i32) -> Book {
        Book {
            title: title.to_string(),
            author: author.to_string(),
            year,
            likes: 0,
        }
    }
    // 2. Define the `new` associated function
}

exeris

11 days ago

4.60ms

89.32kb

pub struct Book {
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: i32,
}
impl Book {
    pub fn new(title: &str, author: &str, year: i32) -> Book {
        Book {
            title: title.to_string(),
            author: author.to_string(),
            year,
            likes: 0,
        }
    }
}

Jan-hjh

11 days ago

3.93ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: i32
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Book {
        Book {
            title: title.to_string(),
            author: author.to_string(),
            year,
            likes: 0
        }
    }
}

makinpaper

11 days ago

3.91ms

89.32kb

pub struct Book {
   pub title: String,
   pub author: String,
   pub year: i32,
   pub likes: i32
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Book {
        Book {
            title: title.to_string(),
            author: author.to_string(),
            year,
            likes: 0
        }
    }
}

Dan Wayne

danwayne-me

12 days ago

4.54ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: i32,
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Self {
        Self {
            title: title.to_string(),
            author: author.to_string(),
            year,
            likes: 0
        }
    }
}

vivek

vivek-inavalli

12 days ago

3.85ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
     pub author: String,
      pub year:  i32 ,
       pub likes: u32,   
}
impl Book {
    pub fn new(title: &str, author: &str, year: i32) -> Book {
        Book {
            title: title.to_string(),
            author: author.to_string(),
            year,
            likes: 0,
        }
    }
}

Amit Patel

amitpatel-wstf

12 days ago

4.07ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title : String,
    pub author : String,
    pub year : i32,
    pub likes : i64
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new ( title : &str, author : &str, year : i32) -> Self {
        Book {
            title : title.to_string(),
            author : author.to_string(),
            year : year,
            likes : 0
        }
    }
}

Hossein Adib

hosseinadib-hub

12 days ago

4.06ms

89.32kb

pub struct Book {
    pub title: String,
    pub author: String,
    pub year: i16,
    pub likes: u32
}
impl Book {
    pub fn new(title: &str, author: &str, year: i16) -> Book{
        Book{
            title: title.to_string(),
            author: author.to_string(),
            year,
            likes:0
        }
    }
}

Rishika Sharma

Rishika-dev

12 days ago

3.87ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: i32,
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Book
    {
        Book{
           title: title.to_owned(),
           author: author.to_owned(),
            year,
            likes: 0
        }
    }
}

fasolyee

fasolyeedev

12 days ago

3.67ms

89.32kb

pub struct Book {
    pub title : String,
    pub author :String,
    pub year :i32,
    pub likes :i32,
}
impl Book {
    pub fn new(title :&str,author :&str,year :i32) -> Book{
        Book{
            title: title.to_string(),
            author: author.to_string(),
            year,
            likes: 0
        }
    }
}

vqk-2003

12 days ago

3.83ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: i32,
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Self {
        Book {
            title: title.to_string(),
            author: author.to_string(),
            year,
            likes: 0,
        }
    }
}

Alex

ravsii

13 days ago

4.52ms

89.32kb

pub struct Book {
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: u32,
}
impl Book {
    pub fn new(title: &str, author: &str, year: i32) -> Book {
        Book {
            title: title.to_string(),
            author: author.to_string(),
            year,
            likes: 0,
        }
    }
}

batblerone

13 days ago

3.91ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: i32,
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Book {
        Book {
            title: title.to_string(),
            author: author.to_string(),
            year: year,
            likes: 0
        }
    }
}

Yonny Sanchez

yonnylsb

14 days ago

3.88ms

89.32kb

pub struct Book {
    // 1. Define the fields of the struct
    // Make all of them public with `pub`
    // Read the description for the fields
    pub title: String,
    pub author: String,
    pub year: i32,
    pub likes: u32,
}
impl Book {
    // 2. Define the `new` associated function
    pub fn new(title: &str, author: &str, year: i32) -> Book{
        Book {
            title: title.to_string(),
            author: author.to_string(),
            year,
            likes: 0,
        }
    }
}