rustlings/solutions/quizzes/quiz1.rs

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// Mary is buying apples. The price of an apple is calculated as follows:
// - An apple costs 2 rustbucks.
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// - However, if Mary buys more than 40 apples, the price of each apple in the
// entire order is reduced to only 1 rustbuck!
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fn calculate_price_of_apples(n_apples: u64) -> u64 {
if n_apples > 40 {
n_apples
} else {
2 * n_apples
}
}
fn main() {
// You can optionally experiment here.
}
// Don't change the tests!
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn verify_test() {
assert_eq!(calculate_price_of_apples(35), 70);
assert_eq!(calculate_price_of_apples(40), 80);
assert_eq!(calculate_price_of_apples(41), 41);
assert_eq!(calculate_price_of_apples(65), 65);
}
}