Actual source code: ex1.c

petsc-master 2017-12-15
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  1: static char help[] = "Create and view a forest mesh\n\n";

  3:  #include <petscdmforest.h>
  4:  #include <petscoptions.h>

  6: int main(int argc, char **argv)
  7: {
  8:   DM             dm;
  9:   char           typeString[256] = {'\0'};
 10:   PetscViewer    viewer          = NULL;
 11:   PetscBool      flg;

 14:   PetscInitialize(&argc, &argv, NULL,help);if (ierr) return ierr;
 15:   DMCreate(PETSC_COMM_WORLD, &dm);
 16:   PetscStrncpy(typeString,DMFOREST,256);
 17:   PetscOptionsBegin(PETSC_COMM_WORLD,NULL,"DM Forest example options",NULL);
 18:   PetscOptionsString("-dm_type","The type of the dm",NULL,DMFOREST,typeString,sizeof(typeString),NULL);
 19:   PetscOptionsEnd();
 20:   DMSetType(dm,(DMType) typeString);
 21:   DMSetFromOptions(dm);
 22:   DMSetUp(dm);
 23:   PetscOptionsGetViewer(PETSC_COMM_WORLD,NULL,"-dm_view",&viewer,NULL,&flg);
 24:   if (flg) {
 25:     DMView(dm,viewer);
 26:   }
 27:   PetscViewerDestroy(&viewer);
 28:   DMDestroy(&dm);
 29:   PetscFinalize();
 30:   return ierr;
 31: }