Free AI Rust Code Generator Online

fn main() {
    let s1 = String::from("hello"); // s1 is the owner of the String
    let s2 = s1; // s1 is moved to s2, s1 is no longer valid
    // println!("s1: {}", s1); // Error: value borrowed here after move

    let s3 = String::from("world");
    let len = calculate_length(&s3); // borrow s3
    println!("Length of '{}' is {}.", s3, len); // s3 is still valid
}

fn calculate_length(s: &String) -> usize { // s is a reference to a String
    s.len()
}

struct Rectangle {
    width: u32,
    height: u32,
}

impl Rectangle {
    fn area(&self) -> u32 {
        self.width * self.height
    }

    fn can_hold(&self, other: &Rectangle) -> bool {
        self.width > other.width && self.height > other.height
    }
}

fn main() {
    let rect1 = Rectangle { width: 30, height: 50 };
    let rect2 = Rectangle { width: 10, height: 40 };
    let rect3 = Rectangle { width: 60, height: 45 };

    println!("Area of rect1: {}", rect1.area());
    println!("Can rect1 hold rect2? {}", rect1.can_hold(&rect2));
    println!("Can rect1 hold rect3? {}", rect1.can_hold(&rect3));
}

use std::fs::File;
use std::io::ErrorKind;

fn main() {
    let file_name = "example.txt";

    let result = File::open(file_name);

    let file = match result {
        Ok(file) => file,
        Err(error) => match error.kind() {
            ErrorKind::NotFound => {
                File::create(file_name).unwrap_or_else(|error| {
                    panic!("Failed to create file: {:?}", error);
                })
            },
            _ => {
                panic!("Failed to open file: {:?}", error);
            }
        },
    };
}