From a80553612a38c448ff7da46586dd3dff8a3aea6a Mon Sep 17 00:00:00 2001
From: Davis King <davis@dlib.net>
Date: Sun, 22 Mar 2015 19:33:17 -0400
Subject: [PATCH] cleaned up examples

---
 examples/3d_point_cloud_ex.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/examples/3d_point_cloud_ex.cpp b/examples/3d_point_cloud_ex.cpp
index 3cb7d09fa..f64a68976 100644
--- a/examples/3d_point_cloud_ex.cpp
+++ b/examples/3d_point_cloud_ex.cpp
@@ -9,8 +9,10 @@
 
 #include <dlib/gui_widgets.h>
 #include <dlib/image_transforms.h>
+#include <cmath>
 
 using namespace dlib;
+using namespace std;
 
 // ----------------------------------------------------------------------------------------