mirror of
https://github.com/rust-lang/rustlings
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29 lines
686 B
Rust
29 lines
686 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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// I AM NOT DONE
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fn average(values: &[f64]) -> f64 {
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let total = values.iter().fold(0.0, |a, b| a + b);
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total / values.len()
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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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