rustlings/exercises/23_conversions/using_as.rs

27 lines
657 B
Rust
Raw Normal View History

// Type casting in Rust is done via the usage of the `as` operator. Please note
// that the `as` operator is not only used when type casting. It also helps with
// renaming imports.
//
// The goal is to make sure that the division does not fail to compile and
// returns the proper type.
fn average(values: &[f64]) -> f64 {
let total = values.iter().sum::<f64>();
total / values.len()
}
fn main() {
let values = [3.5, 0.3, 13.0, 11.7];
println!("{}", average(&values));
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn returns_proper_type_and_value() {
assert_eq!(average(&[3.5, 0.3, 13.0, 11.7]), 7.125);
}
}