Here's my first Rust program that I could actually use for something:
use std::io;
use std::process;
fn main() {
let mut sum = 0;
loop {
let mut number_str = String::new();
match io::stdin().read_line(&mut number_str) {
Ok(n) => { if n == 0 {break} },
Err(e) => { println!("ERROR: got '{}' when reading a line", e) }
}
match number_str.trim().parse::<i32>() {
Ok(n) => { sum += n }
Err(n) => {
println!("ERROR: Entered something that is not a number: '{}'",
number_str.trim_right());
process::exit(1)
},
}
}
println!("{}", sum);
}
Did I violate any style rules? Is there anything else I should add/change/improve?