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use std::env;
use std::fs::File;
use std::io;
use std::io::BufRead;
fn main() -> io::Result<()> {
for filename in env::args().skip(1) {
let mut f = File::open(&filename)?;
let mut reader = io::BufReader::new(f);
print_words(&mut reader)?;
}
Ok(())
}
fn print_words(reader: &mut io::BufReader<File>) -> io::Result<()> {
for line in reader.lines() {
let line = line?;
print_words_in_line(&line);
}
Ok(())
}
fn print_words_in_line(line: &str) {
let mut was_in_word = false;
for c in line.chars() {
let letter = c.is_alphabetic();
if letter {
was_in_word = true;
print!("{}", c);
} else {
if was_in_word {
println!("");
}
was_in_word = false;
}
}
}
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