From 0e285920aa9bd03fbd3220c7b13022e21cd649e6 Mon Sep 17 00:00:00 2001
From: Krishna Vedala <7001608+kvedala@users.noreply.github.com>
Date: Sun, 31 May 2020 07:53:19 -0400
Subject: [PATCH] activation function not friend

---
 machine_learning/adaline_learning.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/machine_learning/adaline_learning.cpp b/machine_learning/adaline_learning.cpp
index 73a8f4633..278376fea 100644
--- a/machine_learning/adaline_learning.cpp
+++ b/machine_learning/adaline_learning.cpp
@@ -150,7 +150,7 @@ class adaline {
                       << std::endl;
     }
 
-    friend int activation(double x) { return x > 0 ? 1 : -1; }
+    int activation(double x) { return x > 0 ? 1 : -1; }
 
  private:
     /**