sorting and PLF example 2 with modern form.

a lot of C# to be real!

PLF/plf/bsp2_modern.py

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+from typing import List
+
+def add_mountain(names: List[str], heights: List[int]) -> None:
+    """Add a new mountain entry if it doesn't already exist."""
+    name = input("Name des Berges: ").strip()
+    if name in names:
+        print("Schon vorhanden.")
+        return
+
+    try:
+        height = int(input("Höhe: ").strip())
+    except ValueError:
+        print("Ungültige Eingabe! Bitte eine Zahl angeben.")
+        return
+
+    names.append(name)
+    heights.append(height)
+    print(f"'{name}' mit {height} m wurde hinzugefügt.")
+
+
+def display_mountains(names: List[str], heights: List[int]) -> None:
+    """Print the list of all mountains and their heights."""
+    print("\nBergliste:")
+    for name, height in zip(names, heights):
+        print(f"  • {name}: {height} m")
+
+
+def get_highest_mountain(names: List[str], heights: List[int]) -> tuple[str, int]:
+    """Return the highest mountain as (name, height)."""
+    max_height = max(heights)
+    index = heights.index(max_height)
+    return names[index], max_height
+
+
+def calculate_average_height(heights: List[int]) -> float:
+    """Return the average height of all mountains."""
+    return sum(heights) / len(heights)
+
+
+def count_3000ers(heights: List[int]) -> int:
+    """Return how many mountains are 3000 meters or higher."""
+    return sum(h >= 3000 for h in heights)
+
+
+def main() -> None:
+    """Main program loop."""
+    print("Berge Österreich")
+
+    mountain_names = ["Großglockner", "Wildspitze", "Weißkugel", "Großvenediger"]
+    mountain_heights = [3798, 3768, 3738, 3657]
+
+    while True:
+        choice = input("Neue Eingabe (j/n)? ").strip().lower()
+        if choice == "j":
+            add_mountain(mountain_names, mountain_heights)
+        elif choice == "n":
+            break
+        else:
+            print("Bitte nur 'j' oder 'n' eingeben.")
+
+    display_mountains(mountain_names, mountain_heights)
+
+    highest_name, highest_height = get_highest_mountain(mountain_names, mountain_heights)
+    print(f"\nDer höchste Berg ist der {highest_name} mit {highest_height} m.")
+
+    avg_height = calculate_average_height(mountain_heights)
+    print(f"Die durchschnittliche Höhe beträgt {avg_height:.1f} m.")
+
+    count = count_3000ers(mountain_heights)
+    print(f"In der Liste sind {count} 3000er gespeichert.")
+
+
+if __name__ == "__main__":
+    main()