From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Tue, 8 May 2018 09:16:28 +0000 (+0800)
Subject: Do not convert a std::string to char* just to convert it back.
X-Git-Tag: v9.1.0-rc1~1171^2
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=refs%2Fpull%2F6530%2Fhead;p=dealii.git

Do not convert a std::string to char* just to convert it back.
---

diff --git a/examples/step-42/step-42.cc b/examples/step-42/step-42.cc
index c85bc0621a..e3a98014fb 100644
--- a/examples/step-42/step-42.cc
+++ b/examples/step-42/step-42.cc
@@ -2187,8 +2187,8 @@ namespace Step42
 
         solve_newton();
 
-        output_results((std::string("solution-") +
-                        Utilities::int_to_string(current_refinement_cycle, 2)).c_str());
+        output_results(std::string("solution-") +
+                       Utilities::int_to_string(current_refinement_cycle, 2));
 
         computing_timer.print_summary();
         computing_timer.reset();