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 c85bc0621a7946c94b428c18b6a8e3a8828ceac2..e3a98014fbcb86bd1730e8152ee13a9cb52d66f0 100644 (file)
--- 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();