From b5c9663a16980cef9cb7d9f1f46f87effb15f7d6 Mon Sep 17 00:00:00 2001
From: Elias Pipping <elias.pipping@fu-berlin.de>
Date: Mon, 11 Jul 2016 21:37:37 +0200
Subject: [PATCH] Tests: Use C++11 random facilities

---
 dune/solvers/test/common.hh | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/dune/solvers/test/common.hh b/dune/solvers/test/common.hh
index de788e3e..6dcaacdb 100644
--- a/dune/solvers/test/common.hh
+++ b/dune/solvers/test/common.hh
@@ -3,6 +3,7 @@
 #ifndef DUNE_SOLVERS_TESTS_COMMON_HH
 #define DUNE_SOLVERS_TESTS_COMMON_HH
 
+#include <random>
 
 #include <dune/common/fvector.hh>
 #include <dune/common/fmatrix.hh>
@@ -393,6 +394,9 @@ public:
   }
 
   void randomize() {
+    std::default_random_engine generator;
+    std::uniform_real_distribution<double> distribution(-1, 1);
+
     // Set up a random 'solution'
     u = 0;
     for (size_t i = 0; i < u.size(); ++i)
@@ -400,7 +404,7 @@ public:
         // Make the matrix positive-definitive
         if (not trivialDirichletOnly)
           A[i][i][j][j] += 0.5*std::abs(A[0][0][0][0]);
-        u_ex[i][j] = (1.0 * rand()) / RAND_MAX;
+        u_ex[i][j] = distribution(generator);
       }
 
     // Construct right hand side corresponding to the 'solution'
-- 
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