fn main() {
  let one            = [1,2,3]; // <1>
  let two: [u8; 3]   = [1,2,3]; // <2>
  let blank1         = [0; 3]; // <3>
  let blank2: [u8; 3] = [0; 3]; // <4>

  let arrays = [one, two, blank1, blank2]; // <5>

  for a in &arrays { // <6>
    print!("{:?}: ", a);
    for n in a.iter() { // <7>
      print!("\t{} + 10 = {}", n, n+10);
    }

    let mut sum = 0;
    for i in 0..a.len() {
      sum += a[i];
    }
    print!("\t(Σ{:?} = {})", a, sum);
    println!("");
  }
}