rework ortools samples (#4590)

ortools/graph/samples/assignment_linear_sum_assignment.cc

@@ -20,7 +20,10 @@
 #include <string>
 #include <vector>
 
+#include "absl/base/log_severity.h"
+#include "absl/log/globals.h"
 #include "absl/log/log.h"
+#include "ortools/base/init_google.h"
 // [END import]
 
 namespace operations_research {
@@ -77,7 +80,9 @@ void AssignmentLinearSumAssignment() {
 
 }  // namespace operations_research
 
-int main() {
+int main(int argc, char* argv[]) {
+  InitGoogle(argv[0], &argc, &argv, true);
+  absl::SetStderrThreshold(absl::LogSeverityAtLeast::kInfo);
   operations_research::AssignmentLinearSumAssignment();
   return EXIT_SUCCESS;
 }

ortools/graph/samples/assignment_min_flow.cc

@@ -17,6 +17,9 @@
 #include <cstdint>
 #include <vector>
 
+#include "absl/base/log_severity.h"
+#include "absl/log/globals.h"
+#include "ortools/base/init_google.h"
 #include "ortools/graph/min_cost_flow.h"
 // [END import]
 
@@ -93,7 +96,9 @@ void AssignmentMinFlow() {
 
 }  // namespace operations_research
 
-int main() {
+int main(int argc, char* argv[]) {
+  InitGoogle(argv[0], &argc, &argv, true);
+  absl::SetStderrThreshold(absl::LogSeverityAtLeast::kInfo);
   operations_research::AssignmentMinFlow();
   return EXIT_SUCCESS;
 }

ortools/graph/samples/balance_min_flow.cc

@@ -17,6 +17,9 @@
 #include <cstdint>
 #include <vector>
 
+#include "absl/base/log_severity.h"
+#include "absl/log/globals.h"
+#include "ortools/base/init_google.h"
 #include "ortools/graph/min_cost_flow.h"
 // [END import]
 
@@ -101,7 +104,9 @@ void BalanceMinFlow() {
 
 }  // namespace operations_research
 
-int main() {
+int main(int argc, char* argv[]) {
+  InitGoogle(argv[0], &argc, &argv, true);
+  absl::SetStderrThreshold(absl::LogSeverityAtLeast::kInfo);
   operations_research::BalanceMinFlow();
   return EXIT_SUCCESS;
 }

ortools/graph/samples/simple_max_flow_program.cc

@@ -18,6 +18,9 @@
 #include <cstdint>
 #include <vector>
 
+#include "absl/base/log_severity.h"
+#include "absl/log/globals.h"
+#include "ortools/base/init_google.h"
 #include "ortools/graph/max_flow.h"
 // [END import]
 
@@ -68,7 +71,9 @@ void SimpleMaxFlowProgram() {
 
 }  // namespace operations_research
 
-int main() {
+int main(int argc, char* argv[]) {
+  InitGoogle(argv[0], &argc, &argv, true);
+  absl::SetStderrThreshold(absl::LogSeverityAtLeast::kInfo);
   operations_research::SimpleMaxFlowProgram();
   return EXIT_SUCCESS;
 }

ortools/graph/samples/simple_min_cost_flow_program.cc

@@ -18,6 +18,9 @@
 #include <cstdint>
 #include <vector>
 
+#include "absl/base/log_severity.h"
+#include "absl/log/globals.h"
+#include "ortools/base/init_google.h"
 #include "ortools/graph/min_cost_flow.h"
 // [END import]
 
@@ -81,7 +84,9 @@ void SimpleMinCostFlowProgram() {
 
 }  // namespace operations_research
 
-int main() {
+int main(int argc, char* argv[]) {
+  InitGoogle(argv[0], &argc, &argv, true);
+  absl::SetStderrThreshold(absl::LogSeverityAtLeast::kInfo);
   operations_research::SimpleMinCostFlowProgram();
   return EXIT_SUCCESS;
 }