// format:
// { [argument] ':' [[fill] align] [sign] ['#'] [width [$]] ['.' precision [$]] [type] }
fn main() {
    let a = 1111111;

    println!("{}", a);
    println!("pointer: {:p}", &a);
    println!("binary: {:b}", a);
    println!("octet: {:o}", a);
    println!("0x{:x}", a);
    println!("0x{:X}", a);

    println!("{0} {1}", "AA", "BB");
    println!("{a} {b}", a = "AA", b = "BB");
    println!("[{a:^6}] [{b:<6}] [{b:>6}] [{c:<10.3}]", a = "AA", b = "BB", c = 111.1);
}