#![allow(unused_variables)]
use std::fmt;
#[derive(Debug)]
struct Vector2D {
    x: isize,
    y: isize,
}
impl fmt::Display for Vector2D {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        write!(f, "({}, {})", self.x, self.y)
    }
}
impl fmt::Binary for Vector2D {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        let magnitude = (self.x * self.x + self.y * self.y) as f64;
        let magnitude = magnitude.sqrt();
        let decimals = f.precision().unwrap_or(3);
        let string = format!("{magnitude:.decimals$}");
        f.pad_integral(true, "", &string)
    }
}
fn main() {
    let myvector = Vector2D { x: 3, y: 4 };
    println!("{myvector}");
    println!("{myvector:?}");
    println!("{myvector:10.3b}");
}