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