add fifth one

Sources/Aufgabe 5/BUILD.bazel

@@ -0,0 +1,10 @@
+load("@rules_swift//swift:swift.bzl", "swift_binary")
+
+# Per-directory BUILD: define targets where their sources live, then reference
+# them by label (e.g. //Sources/Aufgabe 5:Aufgabe5) from elsewhere to keep the
+# top-level BUILD.bazel uncluttered.
+swift_binary(
+    name = "Aufgabe5",
+    srcs = ["main.swift"],
+    visibility = ["//visibility:public"],
+)

Sources/Aufgabe 5/main.swift

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+import Foundation
+
+let weatherData: [(city: String, description: String, temperature: Double)] = [
+    (city: "Zurich", description: "cloudy", temperature: 18.5),
+    (city: "Bern", description: "sunny", temperature: 22.1),
+    (city: "Geneva", description: "rainy", temperature: 15.3),
+    (city: "Basel", description: "sunny", temperature: 24.7),
+    (city: "Lucerne", description: "foggy", temperature: 11.0),
+    (city: "Lugano", description: "sunny", temperature: 31.2),
+    (city: "Lausanne", description: "cloudy", temperature: 19.8),
+    (city: "Chur", description: "snowing", temperature: -2.5),
+    (city: "Davos", description: "snowing", temperature: -5.1),
+    (city: "Locarno", description: "thunderstorm", temperature: 27.4),
+]
+
+func weatherStation(city: String, description: String, temperature: Double) -> (
+    String, String, Double
+)? {
+    if temperature >= 20 {
+        let dateTimeString = Date.now.formatted(date: .abbreviated, time: .shortened)
+        return (description, dateTimeString, temperature)
+    } else {
+        return nil
+    }
+}
+
+for weather in weatherData {
+    weatherStation(city: weather.0, description: weather.1, temperature: weather.2)
+}