Rainfall C#

Program.cs

using System;

public class Program
{
	public static double GetAverage(double[] arr)
	{
		double sum = 0;
		double amount = 0;
		for (int i = 0; i < arr.Length; i++)
		{
			if (arr[i] == 99999)
				break;
			if (arr[i] > 0)
			{
				sum += arr[i];
				amount++;
			}
		}

		return sum > 0 ? sum / amount : 0;
	}

	public static void Main()
	{
		double[] arr = {-1, 1, 3, 99999};
		double[] arr2 = {99999};
		double[] arr3 = {1, 2};
		double[] arr4 = {1, 2, 99999, 5};
		//Console.WriteLine(GetAverage(arr2));
		Console.WriteLine(GetAverage(arr4));
	}
}