Update

openmp/test_master.cpp

+#include <omp.h>
+#include <iostream>
+
+int main()
+{
+  std::cout << "I'm thread " <<  omp_get_thread_num()
+            << " in a group of " << omp_get_num_threads()
+            << " thread(s)" << std::endl;
+  return 0;
+}