diff --git a/examples/cpp/acp_challenge_routing.cc b/examples/cpp/acp_challenge_routing.cc
index 85517e1152..26f6ae5c60 100644
--- a/examples/cpp/acp_challenge_routing.cc
+++ b/examples/cpp/acp_challenge_routing.cc
@@ -305,5 +305,5 @@ int main(int argc, char** argv) {
     LOG(FATAL) << "Please supply a data file with --input=";
   }
   operations_research::Solve(FLAGS_input, FLAGS_solution);
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/constraint_programming_cp.cc b/examples/cpp/constraint_programming_cp.cc
index cea3da21c7..390cdb3e35 100644
--- a/examples/cpp/constraint_programming_cp.cc
+++ b/examples/cpp/constraint_programming_cp.cc
@@ -60,5 +60,5 @@ int main(int argc, char **argv) {
   google::InitGoogleLogging(argv[0]);
   FLAGS_logtostderr = 1;
   operations_research::RunConstraintProgrammingExample();
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/costas_array.cc b/examples/cpp/costas_array.cc
index f1c59df526..7cf91978ce 100644
--- a/examples/cpp/costas_array.cc
+++ b/examples/cpp/costas_array.cc
@@ -448,5 +448,5 @@ int main(int argc, char** argv) {
     }
   }
 
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/cryptarithm.cc b/examples/cpp/cryptarithm.cc
index b3fdf16417..ce342c709f 100644
--- a/examples/cpp/cryptarithm.cc
+++ b/examples/cpp/cryptarithm.cc
@@ -106,5 +106,5 @@ void Cryptoarithmetics() {
 int main(int argc, char** argv) {
   gflags::ParseCommandLineFlags(&argc, &argv, true);
   operations_research::Cryptoarithmetics();
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/cvrp_disjoint_tw.cc b/examples/cpp/cvrp_disjoint_tw.cc
index 5516ab2e70..d1470e61ec 100644
--- a/examples/cpp/cvrp_disjoint_tw.cc
+++ b/examples/cpp/cvrp_disjoint_tw.cc
@@ -160,5 +160,5 @@ int main(int argc, char** argv) {
   } else {
     LOG(INFO) << "No solution found.";
   }
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/cvrptw.cc b/examples/cpp/cvrptw.cc
index de96a010d6..fecc8524fb 100644
--- a/examples/cpp/cvrptw.cc
+++ b/examples/cpp/cvrptw.cc
@@ -147,5 +147,5 @@ int main(int argc, char** argv) {
   } else {
     LOG(INFO) << "No solution found.";
   }
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/cvrptw_with_breaks.cc b/examples/cpp/cvrptw_with_breaks.cc
index 82a0486959..cd9ed3d54a 100644
--- a/examples/cpp/cvrptw_with_breaks.cc
+++ b/examples/cpp/cvrptw_with_breaks.cc
@@ -187,5 +187,5 @@ int main(int argc, char** argv) {
   } else {
     LOG(INFO) << "No solution found.";
   }
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/cvrptw_with_refueling.cc b/examples/cpp/cvrptw_with_refueling.cc
index 5b6a373c8a..e1c374f0b4 100644
--- a/examples/cpp/cvrptw_with_refueling.cc
+++ b/examples/cpp/cvrptw_with_refueling.cc
@@ -154,5 +154,5 @@ int main(int argc, char** argv) {
   } else {
     LOG(INFO) << "No solution found.";
   }
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/cvrptw_with_resources.cc b/examples/cpp/cvrptw_with_resources.cc
index 502b86063c..638db69b4c 100644
--- a/examples/cpp/cvrptw_with_resources.cc
+++ b/examples/cpp/cvrptw_with_resources.cc
@@ -150,5 +150,5 @@ int main(int argc, char** argv) {
   } else {
     LOG(INFO) << "No solution found.";
   }
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/cvrptw_with_stop_times_and_resources.cc b/examples/cpp/cvrptw_with_stop_times_and_resources.cc
index 744a4d104d..0db9b00b97 100644
--- a/examples/cpp/cvrptw_with_stop_times_and_resources.cc
+++ b/examples/cpp/cvrptw_with_stop_times_and_resources.cc
@@ -188,5 +188,5 @@ int main(int argc, char** argv) {
   } else {
     LOG(INFO) << "No solution found.";
   }
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/dimacs_assignment.cc b/examples/cpp/dimacs_assignment.cc
index 575bb01ab0..a27eb945e1 100644
--- a/examples/cpp/dimacs_assignment.cc
+++ b/examples/cpp/dimacs_assignment.cc
@@ -167,7 +167,7 @@ int SolveDimacsAssignment(int argc, char* argv[]) {
   }
   delete assignment;
   delete graph;
-  return 0;
+  return EXIT_SUCCESS;
 }
 }  // namespace operations_research
 
diff --git a/examples/cpp/dobble_ls.cc b/examples/cpp/dobble_ls.cc
index 279008c2c7..b0ecf613d4 100644
--- a/examples/cpp/dobble_ls.cc
+++ b/examples/cpp/dobble_ls.cc
@@ -756,5 +756,5 @@ int main(int argc, char** argv) {
   const int kCards = kSymbolsPerCard * (kSymbolsPerCard - 1) + 1;
   const int kSymbols = kCards;
   operations_research::SolveDobble(kCards, kSymbols, kSymbolsPerCard);
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/flow_api.cc b/examples/cpp/flow_api.cc
index 5614d92f6e..3094276369 100644
--- a/examples/cpp/flow_api.cc
+++ b/examples/cpp/flow_api.cc
@@ -84,5 +84,5 @@ int main(int argc, char** argv) {
   gflags::ParseCommandLineFlags(&argc, &argv, true);
   operations_research::MinCostFlowOn4x4Matrix();
   operations_research::MaxFeasibleFlow();
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/frequency_assignment_problem.cc b/examples/cpp/frequency_assignment_problem.cc
index 36b30ec45c..3ad0c5860d 100644
--- a/examples/cpp/frequency_assignment_problem.cc
+++ b/examples/cpp/frequency_assignment_problem.cc
@@ -882,5 +882,5 @@ int main(int argc, char** argv) {
       component_id++;
     }
   }
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/golomb.cc b/examples/cpp/golomb.cc
index d52cd4d11a..81c8bbd056 100644
--- a/examples/cpp/golomb.cc
+++ b/examples/cpp/golomb.cc
@@ -100,5 +100,5 @@ int main(int argc, char** argv) {
       operations_research::GolombRuler(n);
     }
   }
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/integer_programming.cc b/examples/cpp/integer_programming.cc
index 67d325bc0f..3a08e7b31b 100644
--- a/examples/cpp/integer_programming.cc
+++ b/examples/cpp/integer_programming.cc
@@ -88,5 +88,5 @@ int main(int argc, char** argv) {
   google::InitGoogleLogging(argv[0]);
   FLAGS_logtostderr = 1;
   operations_research::RunAllExamples();
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/job_shop_cp.cc b/examples/cpp/job_shop_cp.cc
index 5c3acef9ff..c6b5b8789a 100644
--- a/examples/cpp/job_shop_cp.cc
+++ b/examples/cpp/job_shop_cp.cc
@@ -199,6 +199,6 @@ int main(int argc, char **argv) {
 	google::InitGoogleLogging(argv[0]);
 	FLAGS_logtostderr = 1;
 	operations_research::SolveJobShopExample();
-	return 0;
+	return EXIT_SUCCESS;
 }
 
diff --git a/examples/cpp/jobshop.cc b/examples/cpp/jobshop.cc
index 8afd111d0f..938cf3e15c 100644
--- a/examples/cpp/jobshop.cc
+++ b/examples/cpp/jobshop.cc
@@ -182,5 +182,5 @@ int main(int argc, char** argv) {
   operations_research::JobShopData data;
   data.Load(FLAGS_data_file);
   operations_research::Jobshop(data);
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/jobshop_earlytardy.cc b/examples/cpp/jobshop_earlytardy.cc
index d0909c718e..be23b56ef1 100644
--- a/examples/cpp/jobshop_earlytardy.cc
+++ b/examples/cpp/jobshop_earlytardy.cc
@@ -408,5 +408,5 @@ int main(int argc, char** argv) {
                             FLAGS_scale_factor, FLAGS_seed);
   }
   operations_research::EtJobShop(data);
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/jobshop_ls.cc b/examples/cpp/jobshop_ls.cc
index 5186c1bec1..8089d6f67c 100644
--- a/examples/cpp/jobshop_ls.cc
+++ b/examples/cpp/jobshop_ls.cc
@@ -222,5 +222,5 @@ int main(int argc, char** argv) {
   operations_research::JobShopData data;
   data.Load(FLAGS_data_file);
   operations_research::JobshopLs(data);
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/knapsack.cc b/examples/cpp/knapsack.cc
index 10c65e94f0..c112399b84 100644
--- a/examples/cpp/knapsack.cc
+++ b/examples/cpp/knapsack.cc
@@ -76,5 +76,5 @@ int main(int argc, char **argv) {
   google::InitGoogleLogging(argv[0]);
   FLAGS_logtostderr = 1;
   operations_research::RunKnapsackExample();
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/linear_assignment_api.cc b/examples/cpp/linear_assignment_api.cc
index a179960f5b..cd239e5fd0 100644
--- a/examples/cpp/linear_assignment_api.cc
+++ b/examples/cpp/linear_assignment_api.cc
@@ -69,5 +69,5 @@ int main(int argc, char** argv) {
   gflags::ParseCommandLineFlags(&argc, &argv, true);
   operations_research::AssignmentOn4x4Matrix();
   operations_research::AnotherAssignment();
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/linear_programming.cc b/examples/cpp/linear_programming.cc
index 9ada619906..94f6ebd181 100644
--- a/examples/cpp/linear_programming.cc
+++ b/examples/cpp/linear_programming.cc
@@ -78,5 +78,5 @@ int main(int argc, char** argv) {
   google::InitGoogleLogging(argv[0]);
   FLAGS_logtostderr = 1;
   operations_research::RunLinearProgrammingExample();
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/linear_solver_protocol_buffers.cc b/examples/cpp/linear_solver_protocol_buffers.cc
index 341a2e7658..a0a692a874 100644
--- a/examples/cpp/linear_solver_protocol_buffers.cc
+++ b/examples/cpp/linear_solver_protocol_buffers.cc
@@ -101,5 +101,5 @@ void RunAllExamples() {
 int main(int argc, char** argv) {
   gflags::ParseCommandLineFlags(&argc, &argv, true);
   operations_research::RunAllExamples();
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/ls_api.cc b/examples/cpp/ls_api.cc
index be5f2ac259..e0d34f5406 100644
--- a/examples/cpp/ls_api.cc
+++ b/examples/cpp/ls_api.cc
@@ -201,5 +201,5 @@ int main(int argc, char** argv) {
   operations_research::SolveProblem(operations_research::LNS);
   operations_research::SolveProblem(operations_research::LS);
   operations_research::SolveProblem(operations_research::LS_WITH_FILTER);
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/magic_square.cc b/examples/cpp/magic_square.cc
index 128b557b4e..423d8b8cd1 100644
--- a/examples/cpp/magic_square.cc
+++ b/examples/cpp/magic_square.cc
@@ -156,5 +156,5 @@ int main(int argc, char** argv) {
       operations_research::MagicSquare(n);
     }
   }
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/max_flow.cc b/examples/cpp/max_flow.cc
index 22e16e6ee1..5b41b47bde 100644
--- a/examples/cpp/max_flow.cc
+++ b/examples/cpp/max_flow.cc
@@ -64,5 +64,5 @@ int main(int argc, char** argv) {
   google::InitGoogleLogging(argv[0]);
   FLAGS_logtostderr = 1;
   operations_research::SolveMaxFlow();
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/min_cost_flow.cc b/examples/cpp/min_cost_flow.cc
index 61d7e9dc6a..5a03c1c572 100644
--- a/examples/cpp/min_cost_flow.cc
+++ b/examples/cpp/min_cost_flow.cc
@@ -84,5 +84,5 @@ int main(int argc, char** argv) {
   google::InitGoogleLogging(argv[0]);
   FLAGS_logtostderr = 1;
   operations_research::SolveMinCostFlow();
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/multidim_knapsack.cc b/examples/cpp/multidim_knapsack.cc
index 7f6a07b455..f01db7d65d 100644
--- a/examples/cpp/multidim_knapsack.cc
+++ b/examples/cpp/multidim_knapsack.cc
@@ -350,5 +350,5 @@ int main(int argc, char** argv) {
   operations_research::MultiDimKnapsackData data;
   data.Load(FLAGS_data_file);
   operations_research::SolveKnapsack(&data);
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/network_routing.cc b/examples/cpp/network_routing.cc
index 9fcfb55a46..0c581d24dc 100644
--- a/examples/cpp/network_routing.cc
+++ b/examples/cpp/network_routing.cc
@@ -927,5 +927,5 @@ int main(int argc, char** argv) {
   solver.Init(data, FLAGS_extra_hops, FLAGS_max_paths);
   LOG(INFO) << "Final cost = "
             << solver.LnsSolve(FLAGS_time_limit, FLAGS_fail_limit);
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/nqueens.cc b/examples/cpp/nqueens.cc
index 310294f881..38f42047b0 100644
--- a/examples/cpp/nqueens.cc
+++ b/examples/cpp/nqueens.cc
@@ -273,5 +273,5 @@ int main(int argc, char** argv) {
       operations_research::NQueens(n);
     }
   }
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/nqueens2.cc b/examples/cpp/nqueens2.cc
index 031ad34e03..ab6beee2b1 100644
--- a/examples/cpp/nqueens2.cc
+++ b/examples/cpp/nqueens2.cc
@@ -71,5 +71,5 @@ int main(int argc, char** argv) {
       operations_research::NQueens(n);
     }
   }
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/nurses_cp.cc b/examples/cpp/nurses_cp.cc
index 76cc25a2da..328386dd41 100644
--- a/examples/cpp/nurses_cp.cc
+++ b/examples/cpp/nurses_cp.cc
@@ -215,5 +215,5 @@ int main(int argc, char **argv) {
 	google::InitGoogleLogging(argv[0]);
 	FLAGS_logtostderr = 1;
 	operations_research::SolveNursesExample();
-	return 0;
+	return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/pdptw.cc b/examples/cpp/pdptw.cc
index 261c6c9d4d..0aff16e7a6 100644
--- a/examples/cpp/pdptw.cc
+++ b/examples/cpp/pdptw.cc
@@ -310,5 +310,5 @@ int main(int argc, char** argv) {
   if (!operations_research::LoadAndSolve(FLAGS_pdp_file)) {
     LOG(INFO) << "Error solving " << FLAGS_pdp_file;
   }
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/rabbits_pheasants_cp.cc b/examples/cpp/rabbits_pheasants_cp.cc
index 477414b4a1..5efa08a6f9 100644
--- a/examples/cpp/rabbits_pheasants_cp.cc
+++ b/examples/cpp/rabbits_pheasants_cp.cc
@@ -63,5 +63,5 @@ int main(int argc, char **argv) {
   google::InitGoogleLogging(argv[0]);
   FLAGS_logtostderr = 1;
   operations_research::RunConstraintProgrammingExample();
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/random_tsp.cc b/examples/cpp/random_tsp.cc
index ffb865e0cb..2742e9260f 100644
--- a/examples/cpp/random_tsp.cc
+++ b/examples/cpp/random_tsp.cc
@@ -163,5 +163,5 @@ void Tsp() {
 int main(int argc, char** argv) {
   gflags::ParseCommandLineFlags(&argc, &argv, true);
   operations_research::Tsp();
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/sat_runner.cc b/examples/cpp/sat_runner.cc
index 0254297ac0..67bd13a218 100644
--- a/examples/cpp/sat_runner.cc
+++ b/examples/cpp/sat_runner.cc
@@ -243,7 +243,7 @@ int Run() {
     // really use it for any other purpose, we comply.
     if (response.status() == CpSolverStatus::FEASIBLE) return 10;
     if (response.status() == CpSolverStatus::INFEASIBLE) return 20;
-    return 0;
+    return EXIT_SUCCESS;
   }
 
   if (FLAGS_strict_validity) {
@@ -419,7 +419,7 @@ int Run() {
   // really use it for any other purpose, we comply.
   if (result == SatSolver::FEASIBLE) return 10;
   if (result == SatSolver::INFEASIBLE) return 20;
-  return 0;
+  return EXIT_SUCCESS;
 }
 
 }  // namespace
diff --git a/examples/cpp/simple_program.cc b/examples/cpp/simple_program.cc
index e276f95123..5f8ebf7ffd 100644
--- a/examples/cpp/simple_program.cc
+++ b/examples/cpp/simple_program.cc
@@ -35,6 +35,6 @@ int main() {
   cout << "x = " << x->solution_value() << endl;
   cout << "y = " << y->solution_value() << endl;
 
-  return 0;
+  return EXIT_SUCCESS;
 }
 // [END program]
diff --git a/examples/cpp/slitherlink.cc b/examples/cpp/slitherlink.cc
index 19dc406217..95365664fe 100644
--- a/examples/cpp/slitherlink.cc
+++ b/examples/cpp/slitherlink.cc
@@ -401,5 +401,5 @@ int main() {
   operations_research::SlitherLink(medium);
   std::cout << "Big problem" << std::endl;
   operations_research::SlitherLink(big);
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/sports_scheduling.cc b/examples/cpp/sports_scheduling.cc
index 15bf9c5551..33d139e79b 100644
--- a/examples/cpp/sports_scheduling.cc
+++ b/examples/cpp/sports_scheduling.cc
@@ -399,5 +399,5 @@ int main(int argc, char** argv) {
   CHECK_GE(FLAGS_num_teams, 2) << "At least 2 teams";
   CHECK_LT(FLAGS_num_teams, 16) << "The model does not scale beyond 14 teams";
   operations_research::SportsScheduling(FLAGS_num_teams);
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/stigler_diet.cc b/examples/cpp/stigler_diet.cc
index dec076d02b..728189251b 100644
--- a/examples/cpp/stigler_diet.cc
+++ b/examples/cpp/stigler_diet.cc
@@ -296,5 +296,5 @@ int main(int argc, char** argv) {
   google::InitGoogleLogging(argv[0]);
   FLAGS_logtostderr = 1;
   operations_research::RunStiglerDietExample();
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/strawberry_fields_with_column_generation.cc b/examples/cpp/strawberry_fields_with_column_generation.cc
index 22209456ba..b656f6c5dc 100644
--- a/examples/cpp/strawberry_fields_with_column_generation.cc
+++ b/examples/cpp/strawberry_fields_with_column_generation.cc
@@ -636,5 +636,5 @@ int main(int argc, char** argv) {
         operations_research::kInstances[FLAGS_colgen_instance];
     operations_research::SolveInstance(instance, solver_type);
   }
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/tsp.cc b/examples/cpp/tsp.cc
index 12589f23d5..de825db133 100644
--- a/examples/cpp/tsp.cc
+++ b/examples/cpp/tsp.cc
@@ -138,5 +138,5 @@ int main(int argc, char** argv) {
   google::InitGoogleLogging(argv[0]);
   FLAGS_logtostderr = 1;
   operations_research::Solve();
-  return 0;
+  return EXIT_SUCCESS;
 }
diff --git a/examples/cpp/vrp.cc b/examples/cpp/vrp.cc
index c69ed356e5..1177f3da2a 100644
--- a/examples/cpp/vrp.cc
+++ b/examples/cpp/vrp.cc
@@ -160,5 +160,5 @@ int main(int argc, char** argv) {
   google::InitGoogleLogging(argv[0]);
   FLAGS_logtostderr = 1;
   operations_research::Solve();
-  return 0;
+  return EXIT_SUCCESS;
 }