#![allow(dead_code, deprecated, unused_variables, unused_mut)]
use std::fmt;
struct Length(i32);
impl fmt::Octal for Length {
    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
        let val = self.0;
        fmt::Octal::fmt(&val, f)
    }
}
fn main() {
    let l = Length(9);
    assert_eq!(format!("l as octal is: {l:o}"), "l as octal is: 11");
    assert_eq!(format!("l as octal is: {l:#06o}"), "l as octal is: 0o0011");
}