28 lines
686 B
Rust
28 lines
686 B
Rust
// 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.
|
|
|
|
// I AM NOT DONE
|
|
|
|
fn average(values: &[f64]) -> f64 {
|
|
let total = values.iter().fold(0.0, |a, b| a + b);
|
|
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);
|
|
}
|
|
}
|