box-o-sand/rustbyexample/hello/print_display.rs

15 lines
238 B
Rust

use std::fmt;
struct Structure(i32);
impl fmt::Display for Structure {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "{}", self.0)
}
}
fn main() {
let s = Structure(4);
println!("s={}", s);
}