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;

  PetscFunctionBeginUser;
  PetscCall(PetscInitialize(&argc, &argv, NULL, 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*/