- MPI_Op_create(&left, 0/*non-commutative*/, &left_op);
- MPI_Op_create(&right, 0/*non-commutative*/, &right_op);
- MPI_Op_create(&nc_sum, 0/*non-commutative*/, &nc_sum_op);
+ MPI_Op_create(&left, 0 /*non-commutative */ , &left_op);
+ MPI_Op_create(&right, 0 /*non-commutative */ , &right_op);
+ MPI_Op_create(&nc_sum, 0 /*non-commutative */ , &nc_sum_op);