flush example

main.rs

use std::io;
use std::io::Write;

fn main() {
    let s = read_string("aaa");
    println!("inputed {}", s);
}

fn read_string(comment: &str) -> String {
    print!("{}", comment);
    io::stdout().flush().ok().expect("Error flushing");
    let mut string: String = String::new();

    std::io::stdin().read_line(&mut string)
        .ok()
        .expect("Error read line!");

    return string;
}