quiz1 solution

exercises/quizzes/quiz1.rs

@@ -10,27 +10,22 @@
 // quantity bought.
 
 // Put your function here!
-// fn calculate_price_of_apples {
+// fn calculate_price_of_apples(???) -> ??? {
 
 fn main() {
     // You can optionally experiment here.
 }
 
+// Don't change the tests!
 #[cfg(test)]
 mod tests {
     use super::*;
 
-    // Don't modify this test!
     #[test]
     fn verify_test() {
-        let price1 = calculate_price_of_apples(35);
-        let price2 = calculate_price_of_apples(40);
-        let price3 = calculate_price_of_apples(41);
-        let price4 = calculate_price_of_apples(65);
-
-        assert_eq!(70, price1);
-        assert_eq!(80, price2);
-        assert_eq!(41, price3);
-        assert_eq!(65, price4);
+        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);
     }
 }

solutions/quizzes/quiz1.rs

@@ -1 +1,31 @@
-// Solutions will be available before the stable release. Thank you for testing the beta version 🥰
+// Mary is buying apples. The price of an apple is calculated as follows:
+// - An apple costs 2 rustbucks.
+// - If Mary buys more than 40 apples, each apple only costs 1 rustbuck!
+// Write a function that calculates the price of an order of apples given the
+// quantity bought.
+
+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);
+    }
+}