int poisson_main(int argc, char **argv, MPI_Comm comm, int numProcs, int localProc)
int beam_oldfei_main(int argc, char **argv, MPI_Comm comm, int numProcs, int localProc)
int poisson3_main(int argc, char **argv, MPI_Comm comm, int numProcs, int localProc)
int cFeiTester_main(int argc, char **argv, MPI_Comm comm, int numProcs, int localProc)
int beam_main(int argc, char **argv, MPI_Comm comm, int numProcs, int localProc)
int feiDriver_main(int argc, char **argv, MPI_Comm comm, int numProcs, int localProc)