Actual source code: ex40.c
1: static char help[] = "Tests taking part of existing array to create a new vector.\n\n";
3: #include <petscvec.h>
5: int main(int argc, char **argv)
6: {
7: PetscMPIInt size;
8: PetscInt n = 10, i;
9: PetscScalar array[10];
10: Vec x;
12: PetscFunctionBeginUser;
13: PetscCall(PetscInitialize(&argc, &argv, (char *)0, help));
14: PetscCallMPI(MPI_Comm_size(PETSC_COMM_WORLD, &size));
15: PetscCheck(size == 1, PETSC_COMM_WORLD, PETSC_ERR_WRONG_MPI_SIZE, "This is a uniprocessor example only!");
17: /* create vector */
18: for (i = 0; i < n; i++) array[i] = i;
19: n = n - 1;
21: PetscCall(VecCreateSeqWithArray(PETSC_COMM_SELF, 1, n, array + 1, &x));
22: PetscCall(VecView(x, PETSC_VIEWER_STDOUT_SELF));
23: PetscCall(VecDestroy(&x));
24: PetscCall(PetscFinalize());
25: return 0;
26: }