ref: 8cd0cd7c7f5ae4003bcb9e95cd8e3f81a63d30a3 dir: /tests/0018-structptr.c/
int main() { struct S { int x; int y; } s; struct S *p; p = &s; s.x = 1; p->y = 2; return p->y + p->x - 3; }