scaffold 2024

2024/Program.cs

@@ -0,0 +1,31 @@
+using _2024;
+
+Console.Write("Enter a day: ");
+var input = Console.ReadLine();
+
+if (!int.TryParse(input, out var day)) {
+    Console.Error.WriteLine("Error: input is not a valid integer.");
+    Environment.Exit(1);
+}
+
+if (day is < 1 or > 25) {
+    Console.Error.WriteLine("Error: day must be between 1 and 25.");
+    Environment.Exit(1);
+}
+
+var dayStr = day.ToString();
+if (day < 10) {
+    dayStr = "0" + dayStr;
+}
+
+// Instantiate an ISolution named 's' based on the day, e.g., Day02 for day == 2, then run it
+var typeName = $"_2024.Day{dayStr}";
+var type = typeof(ISolution).Assembly.GetType(typeName);
+
+if (type is null || !typeof(ISolution).IsAssignableFrom(type)) {
+    Console.Error.WriteLine($"Error: could not find a solution class for day {dayStr}.");
+    Environment.Exit(1);
+}
+
+var s = (ISolution)Activator.CreateInstance(type)!;
+s.Run();