Hello world!

RustでHello world

helloworld.rs

fn main () {
    println!("Hello World");
}

コンパイル

rustc helloworld.rs

実行

./helloworld

ferris-says

cargo new hello-rust

cd hello-rust

cargo add ferris-says
cd src

main.rs

use ferris_says::say;
use std::io::{stdout,BufWriter};

fn main() {
    let stdout = stdout();
    let message = String::from("Hello fellow Rustacean!");
    let width = message.chars().count();

    let mut writer = BufWriter::new(stdout.lock());
    say(&message, width, &mut writer).unwrap();
}

cargo run