Add parameter input

26_Chomp/csharp/IOExtensions.cs

@@ -0,0 +1,24 @@
+namespace Chomp;
+
+internal static class IOExtensions
+{
+    public static (float, int, int) ReadParameters(this IReadWrite io)
+        => (
+            (int)io.ReadNumber(Resource.Prompts.HowManyPlayers),
+            io.ReadNumberWithMax(Resource.Prompts.HowManyRows, 9, Resource.Strings.TooManyRows),
+            io.ReadNumberWithMax(Resource.Prompts.HowManyColumns, 9, Resource.Strings.TooManyColumns)
+        );
+
+    private static int ReadNumberWithMax(this IReadWrite io, string initialPrompt, int max, string reprompt)
+    {
+        var prompt = initialPrompt;
+
+        while (true)
+        {
+            var response = io.ReadNumber(prompt);
+            if (response <= 9) { return (int)response; }
+
+            prompt = $"{reprompt} {initialPrompt.ToLowerInvariant()}";
+        }
+    }
+}