static char help[] = "Tests DMLocalToGlobal() for dof > 1\n\n";

#include <petscdm.h>
#include <petscdmda.h>

int main(int argc,char **argv)
{
  PetscInt       M = 6,N = 5,m = PETSC_DECIDE,n = PETSC_DECIDE,i,j,is,js,in,jen;
  DM             da;
  Vec            local,global;
  PetscScalar    ***l;

  PetscCall(PetscInitialize(&argc,&argv,(char*)0,help));
  /* Create distributed array and get vectors */
  PetscCall(DMDACreate2d(PETSC_COMM_WORLD, DM_BOUNDARY_NONE, DM_BOUNDARY_NONE,DMDA_STENCIL_BOX,M,N,m,n,3,1,NULL,NULL,&da));
  PetscCall(DMSetFromOptions(da));
  PetscCall(DMSetUp(da));
  PetscCall(DMCreateGlobalVector(da,&global));
  PetscCall(DMCreateLocalVector(da,&local));

  PetscCall(DMDAGetCorners(da,&is,&js,0,&in,&jen,0));
  PetscCall(DMDAVecGetArrayDOF(da,local,&l));
  for (i=is; i<is+in; i++) {
    for (j=js; j<js+jen; j++) {
      l[j][i][0] = 3*(i + j*M);
      l[j][i][1] = 3*(i + j*M) + 1;
      l[j][i][2] = 3*(i + j*M) + 2;
    }
  }
  PetscCall(DMDAVecRestoreArrayDOF(da,local,&l));
  PetscCall(DMLocalToGlobalBegin(da,local,ADD_VALUES,global));
  PetscCall(DMLocalToGlobalEnd(da,local,ADD_VALUES,global));

  PetscCall(VecView(global,PETSC_VIEWER_STDOUT_WORLD));

  /* Free memory */
  PetscCall(VecDestroy(&local));
  PetscCall(VecDestroy(&global));
  PetscCall(DMDestroy(&da));
  PetscCall(PetscFinalize());
  return 0;
}

/*TEST

      test:
         filter: grep -v -i Process
         output_file: output/ex24_1.out

      test:
         suffix: 2
         nsize: 2
         filter: grep -v -i Process
         output_file: output/ex24_2.out

      test:
         suffix: 3
         nsize: 3
         filter: grep -v -i Process
         output_file: output/ex24_2.out

      test:
         suffix: 4
         nsize: 4
         filter: grep -v -i Process
         output_file: output/ex24_2.out

      test:
         suffix: 5
         nsize: 5
         filter: grep -v -i Process
         output_file: output/ex24_2.out

      test:
         suffix: 6
         nsize: 6
         filter: grep -v -i Process
         output_file: output/ex24_2.out

TEST*/