#include <mpi.h> #include <iostream> int main(int argc, char *argv[]) { #if defined(MPI_VERSION) && (MPI_VERSION >= 2) MPI::Init_thread(MPI_THREAD_MULTIPLE); #else MPI::Init(); #endif int size = MPI::COMM_WORLD.Get_size(); int rank = MPI::COMM_WORLD.Get_rank(); int len; char name[MPI_MAX_PROCESSOR_NAME]; MPI::Get_processor_name(name, len); std::cout << "Hello, World! " << "I am process " << rank << " of " << size << " on " << name << "." << std::endl; MPI::Finalize(); return 0; } // Local Variables: // mode: C++ // c-basic-offset: 2 // indent-tabs-mode: nil // End: