From f8925e482216aecd152bc898653ee9ab82213cf3 Mon Sep 17 00:00:00 2001
From: Krishna Vedala <7001608+kvedala@users.noreply.github.com>
Date: Sat, 30 May 2020 21:46:28 -0400
Subject: [PATCH] add cmath for same bug:
 [LWG2192](https://cplusplus.github.io/LWG/issue2192) for std::abs on MacOS

---
 machine_learning/adaline_learning.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/machine_learning/adaline_learning.cpp b/machine_learning/adaline_learning.cpp
index 29eccd886..871c78074 100644
--- a/machine_learning/adaline_learning.cpp
+++ b/machine_learning/adaline_learning.cpp
@@ -22,10 +22,11 @@
 
 #include <cassert>
 #include <climits>
-#include <cstdlib>
 #include <ctime>
 #include <iostream>
 #include <vector>
+#include <cmath>
+#include <cstdlib>
 
 #define MAX_ITER 500  // INT_MAX  ///< Maximum number of iterations to learn