first commit

RecurringRainfall/CSharp/recurringrainfall.cs

@@ -0,0 +1,34 @@
+namespace LanguageBasics
+{
+	class CSharpRecurringRainfall
+    {		
+		static int ReadNextInput()
+		{
+			System.Console.Write("Enter rainfall int, 99999 to quit: ");
+			string input = System.Console.ReadLine();
+			
+			if (System.Int32.TryParse(input, out int num))
+			{
+				return num;
+			}
+			else
+			{
+				System.Console.WriteLine("Invalid input");
+				return ReadNextInput();
+			}
+		}
+		
+        static void Main()
+        {
+			double currentAverage = 0;
+			int currentEntryNumber = 0;
+			
+            for (int lastInput = ReadNextInput(); lastInput != 99999; lastInput = ReadNextInput())
+            {
+				currentEntryNumber++;
+				currentAverage = currentAverage + (1.0/(float)currentEntryNumber)*lastInput - (1.0/(float)currentEntryNumber)*currentAverage;
+				System.Console.WriteLine("New Average: " + currentAverage);
+			}
+        }
+    }
+}