1 2 static char help[] = "Tests taking part of existing array to create a new vector.\n\n"; 3 4 #include <petscvec.h> 5 6 int main(int argc, char **argv) { 7 PetscMPIInt size; 8 PetscInt n = 10, i; 9 PetscScalar array[10]; 10 Vec x; 11 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!"); 16 17 /* create vector */ 18 for (i = 0; i < n; i++) array[i] = i; 19 n = n - 1; 20 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 } 27