From: Martin Kronbichler <kronbichler@lnm.mw.tum.de>
Date: Mon, 9 Mar 2020 18:26:06 +0000 (+0100)
Subject: Add missing include file for step-69
X-Git-Tag: v9.2.0-rc1~435^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F9642%2Fhead;p=dealii.git

Add missing include file for step-69
---

diff --git a/examples/step-69/step-69.cc b/examples/step-69/step-69.cc
index b4f1b00c9b..49062a7540 100644
--- a/examples/step-69/step-69.cc
+++ b/examples/step-69/step-69.cc
@@ -82,8 +82,9 @@
 #include <boost/range/irange.hpp>
 #include <boost/range/iterator_range.hpp>
 
-// For std::isnan and std::isinf.
+// For std::isnan, std::isinf, and std::ifstream
 #include <cmath>
+#include <fstream>
 
 // @sect3{Class template declarations}
 //