use std::env;
use std::fs::File;
use std::io::{ BufReader, BufRead };

fn main() {
    let file = File::open(env::args().nth(1).expect("Must supply one argument"))
                    .ok().expect("Couldn't open file");
    let input = BufReader::new(file);
    for line in input.lines() {
        match line {
            Ok(l) => println!("{}", l),
            Err(e) => panic!("{}", e)
        }
    }
}