From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Fri, 27 Oct 2017 21:51:34 +0000 (-0600)
Subject: Use appropriate data types.
X-Git-Tag: v9.0.0-rc1~860^2~4
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=20f4c52bb1506f900e41ed6744ca9f1d147c3b7d;p=dealii.git

Use appropriate data types.
---

diff --git a/include/deal.II/lac/block_vector_base.h b/include/deal.II/lac/block_vector_base.h
index 02a967252d..c2e0c59da7 100644
--- a/include/deal.II/lac/block_vector_base.h
+++ b/include/deal.II/lac/block_vector_base.h
@@ -18,6 +18,7 @@
 
 
 #include <deal.II/base/config.h>
+#include <deal.II/base/numbers.h>
 #include <deal.II/base/exceptions.h>
 #include <deal.II/base/subscriptor.h>
 #include <deal.II/base/memory_consumption.h>
@@ -1693,9 +1694,9 @@ BlockVectorBase<VectorType>::mean_value () const
   value_type sum = 0.;
   // need to do static_cast as otherwise it won't work with value_type=complex<T>
   for (size_type i=0; i<n_blocks(); ++i)
-    sum += components[i].mean_value() * static_cast<double>(components[i].size());
+    sum += components[i].mean_value() * (typename numbers::NumberTraits<value_type>::real_type(components[i].size()));
 
-  return sum/static_cast<double>(size());
+  return sum/(typename numbers::NumberTraits<value_type>::real_type(size()));
 }