From: Wolfgang Bangerth <bangerth@colostate.edu>
Date: Tue, 9 Jul 2024 21:14:26 +0000 (-0600)
Subject: Read input file name from the command line.
X-Git-Tag: v9.6.0-rc1~78^2~1
X-Git-Url: https://gitweb.dealii.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=11b1c6e94d9f8ba278b53b07c47fc3a5481d94c3;p=dealii.git

Read input file name from the command line.
---

diff --git a/examples/step-86/step-86.cc b/examples/step-86/step-86.cc
index 4dd5daac1a..cc54612330 100644
--- a/examples/step-86/step-86.cc
+++ b/examples/step-86/step-86.cc
@@ -1115,8 +1115,10 @@ int main(int argc, char **argv)
 
       Utilities::MPI::MPI_InitFinalize mpi_initialization(argc, argv, 1);
       HeatEquation<2>                  heat_equation_solver(MPI_COMM_WORLD);
-      ParameterAcceptor::initialize("heat_equation.prm",
-                                    "heat_equation_used.prm");
+
+      const std::string input_filename =
+        (argc > 1 ? argv[1] : "heat_equation.prm");
+      ParameterAcceptor::initialize(input_filename, "heat_equation_used.prm");
       heat_equation_solver.run();
     }
   catch (std::exception &exc)