doc-ja-comment-out.rs

use std::io::{self};


fn main() -> io::Result<()> {
    println!("<!--");
    let mut paragraph: [String; 30] = Default::default();
    let mut count = 0;
    loop {
        let mut buffer = String::new();
        match io::stdin().read_line(&mut buffer) {
            Ok(n) => {
                if n == 0{
                    break;
                }
                if buffer == "\n"{
                    println!("-->");
                    println!("\n{}\n", paragraph.join(" ").trim_end().to_string());
                    println!("<!--");
                    paragraph = Default::default();
                    count = 0;
                    continue;
                }
                print!("{}", buffer);
                paragraph[count] = buffer.trim_end().to_string();
                count += 1;
            }
            Err(error) => println!("error: {}", error),
        }
    }

    println!("-->");
    println!("\n{}\n", paragraph.join(" ").trim_end().to_string());
    Ok(())
}