meap/meap-code/ch2/ch2-read-file.rs


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use std::fs::File;
use std::io::BufReader;
use std::io::prelude::*;

fn main() {
  let mut f = File::open("readme.md").unwrap();
  let mut reader = BufReader::new(f);

  let mut line = String::new();
  loop {
    let len = reader.read_line(&mut line).unwrap();

    if len == 0 {
      break
    }
    println!("{} ({} bytes long)", line, len);

    line.truncate(0);
  }

}