move input files into exercise directory

solutions/24_async/async1.rs

@@ -6,14 +6,18 @@
 // Let's simulate this using asynchronous programming. Each person is
 // represented as an asynchronous task, which can be executed concurrently.
 
+const SCORES_CLASS_A: &str = "exercises/24_async/scores_class_a.txt";
+const SCORES_CLASS_B: &str = "exercises/24_async/scores_class_b.txt";
+const SCORES_CLASS_C: &str = "exercises/24_async/scores_class_c.txt";
+
 // Async tasks need to be executed by a "runtime", which is not provided by
 // Rust's standard library. Here, we use the mainstream runtime `tokio`.
 // The macro `tokio::main` wraps the entire main function in a runtime.
 #[tokio::main]
 async fn main() {
-    let mean_score_a = tokio::spawn(calculate_mean_score("input_files/scores_class_a.txt"));
-    let mean_score_b = tokio::spawn(calculate_mean_score("input_files/scores_class_b.txt"));
-    let mean_score_c = tokio::spawn(calculate_mean_score("input_files/scores_class_c.txt"));
+    let mean_score_a = tokio::spawn(calculate_mean_score(SCORES_CLASS_A));
+    let mean_score_b = tokio::spawn(calculate_mean_score(SCORES_CLASS_B));
+    let mean_score_c = tokio::spawn(calculate_mean_score(SCORES_CLASS_C));
 
     assert_eq!(mean_score_a.await.unwrap(), 84); // alice
     assert_eq!(mean_score_b.await.unwrap(), 89); // bob