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31 lines
807 B
Rust
31 lines
807 B
Rust
// Mary is buying apples. The price of an apple is calculated as follows:
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// - An apple costs 2 rustbucks.
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// - If Mary buys more than 40 apples, each apple only costs 1 rustbuck!
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// Write a function that calculates the price of an order of apples given the
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// quantity bought.
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fn calculate_price_of_apples(n_apples: u64) -> u64 {
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if n_apples > 40 {
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n_apples
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} else {
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2 * n_apples
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}
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}
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fn main() {
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// You can optionally experiment here.
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}
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// Don't change the tests!
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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 verify_test() {
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assert_eq!(calculate_price_of_apples(35), 70);
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assert_eq!(calculate_price_of_apples(40), 80);
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assert_eq!(calculate_price_of_apples(41), 41);
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assert_eq!(calculate_price_of_apples(65), 65);
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}
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}
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