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example/UG_ExMaps/cxx_main.cpp
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00004 //               Epetra: Linear Algebra Services Package
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00041 
00042 
00043 #include <stdio.h>
00044 #include <stdlib.h>
00045 #include "Epetra_config.h"
00046 #ifdef HAVE_MPI
00047 #include "mpi.h"
00048 #include "Epetra_MpiComm.h"
00049 #else
00050 #include "Epetra_SerialComm.h"
00051 #endif
00052 #include "Epetra_Map.h"
00053 #include "Epetra_IntSerialDenseVector.h"
00054 #include "Epetra_Version.h"
00055 
00056 // prototype
00057 int main(int argc, char *argv[]) {
00058 #ifdef HAVE_MPI
00059   MPI_Init(&argc,&argv);
00060   Epetra_MpiComm Comm(MPI_COMM_WORLD);
00061 #else
00062   Epetra_SerialComm Comm;
00063 #endif
00064 
00065   if (Comm.MyPID()==0)
00066     std::cout << Epetra_Version() << std::endl << std::endl;
00067 
00068   std::cout << Comm << std::endl; // Print out process information
00069   // Get the number of global equations from the command line
00070   if (argc!=2) {
00071     std::cout << "Usage: " << argv[0] << " number_of_equations" << std::endl;
00072     exit(1);
00073    }
00074   int NumGlobalElements = atoi(argv[1]);
00075   // Construct a Map that puts approximately the same number of
00076   // equations on each processor.
00077   Epetra_Map Map(NumGlobalElements, 0, Comm);
00078   // Get update list and number of local equations from newly created Map.
00079   std::cout << Map << std::endl;
00080 #ifdef UG_EX1_MPI
00081   MPI_Finalize() ;
00082 #endif
00083 return 0;
00084 }
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