step-20: make degree argument obvious

diff --git a/examples/step-20/step-20.cc b/examples/step-20/step-20.cc
index 89ed11124b1623d3a051e58c2e29731a6a4e1d7b..e304fadb003c8c6e5703f7b63a4a624133c1c9e5 100644 (file)
--- a/examples/step-20/step-20.cc
+++ b/examples/step-20/step-20.cc
@@ -806,7 +806,8 @@ int main()
       using namespace dealii;
       using namespace Step20;
 
-      MixedLaplaceProblem<2> mixed_laplace_problem(0);
+      const unsigned int     fe_degree = 0;
+      MixedLaplaceProblem<2> mixed_laplace_problem(fe_degree);
       mixed_laplace_problem.run();
     }
   catch (std::exception &exc)