From b95e89afc40d793710bbf4b1d0d49cf0dd637f5d Mon Sep 17 00:00:00 2001
From: Sakurai <sakurai@kemq.net>
Date: Mon, 5 May 2025 17:24:53 +0900
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---
 StockingData/Lib/Math/AverageMath.cs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/StockingData/Lib/Math/AverageMath.cs b/StockingData/Lib/Math/AverageMath.cs
index 4c7863c..4b55b2c 100644
--- a/StockingData/Lib/Math/AverageMath.cs
+++ b/StockingData/Lib/Math/AverageMath.cs
@@ -4,6 +4,12 @@ public static class AverageMath
 {
     public static double Average(IEnumerable<int> values)
     {
+        // 0件の時、NaNになるため、対応
+        if (values.Count() == 0)
+        {
+            return 0;
+        }
+
         double sum = values.Sum();
         return sum / values.Count();
     }