extern crate failure;

fn get_temp() -> ::std::result::Result<f64, ::failure::Error> {
    //let valid_temps: Vec<f64> = vec![50.0, 45.1, 32.9, 45.1, 43.3, 46.56, 43.6, 23.3];
    let valid_temps: Vec<f64> = Vec::with_capacity(8);

    return valid_temps.iter().sum::<f64>() / valid_temps.len() as f64
}

fn main() {
    println!("temp: {}", get_temp());
}