check_eof.rs

use std::io::stdin;

fn main() {
    let mut line = String::new();
    
    loop {
        let n_read = stdin().read_line(&mut line).unwrap();

        println!("n_read: {}", n_read);

        if n_read == 0 {
            break;
        }

        println!("read line: \"{}\"", line);

        line.clear();
    }
}