From: Peter Munch <peterrmuench@gmail.com>
Date: Mon, 9 Mar 2020 06:32:09 +0000 (+0100)
Subject: Step-69: add missing include cmath
X-Git-Tag: v9.2.0-rc1~437^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F9640%2Fhead;p=dealii.git

Step-69: add missing include cmath
---

diff --git a/examples/step-69/step-69.cc b/examples/step-69/step-69.cc
index fca2a20386..f0d4744c25 100644
--- a/examples/step-69/step-69.cc
+++ b/examples/step-69/step-69.cc
@@ -82,6 +82,9 @@
 #include <boost/range/irange.hpp>
 #include <boost/range/iterator_range.hpp>
 
+// For std::isnan and std::isinf.
+#include <cmath>
+
 // @sect3{Class template declarations}
 //
 // We begin our actual implementation by declaring all classes with their