From 4025aa92e5d1b84fe3b8fe31206c99d63f205e52 Mon Sep 17 00:00:00 2001
From: Krishna Vedala <7001608+kvedala@users.noreply.github.com>
Date: Sat, 30 May 2020 21:36:17 -0400
Subject: [PATCH] fixed issue
 [LWG2192](https://cplusplus.github.io/LWG/issue2192) for std::abs on MacOS

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

diff --git a/machine_learning/adaline_learning.cpp b/machine_learning/adaline_learning.cpp
index b29813984..29eccd886 100644
--- a/machine_learning/adaline_learning.cpp
+++ b/machine_learning/adaline_learning.cpp
@@ -22,6 +22,7 @@
 
 #include <cassert>
 #include <climits>
+#include <cstdlib>
 #include <ctime>
 #include <iostream>
 #include <vector>