The problems that this is an answer key for can be found at the links below:
| Expression | Type | Expression | Type | |
| a | int | f->radius | double | |
| &a | int * | f->center.x | double | |
| *a | error | f->center->y | error (f->center is not a pointer) | |
| *b | int | &g | struct Point * | |
| e | struct Circle | *h | struct Point | |
| b | int * | &(h->x) | double * | |
| & b | int ** | d | *(h.y) | error (h.y is already an error because h is not a struct) |
| c | double | i.m | int | |
| *c | error (c is not a pointer) | j.d | error (j is not a struct) | |
| d | double * | i->y | error (i is not a pointer) | |
| &d | double ** | j->m | int | |
| *e | error (e is not a pointer) | er | (*j).m | int (means same thing as j->m) |
| e.x | error (circle has no member named x) | argc | int | |
| e.radius | double | argv[0] | char * | |
| f.y | error (f is not a struct) | argv[0][0] | char |