A."h" B.字符串的結(jié)束符 C.變量h D.字符h
A.s->next=r;r=s; B.r->next=s;r=s; C.s->next=f;f=s; D.f->next=s;f=s;
A.f=r->next; B.r=r->next; C.r=f->next; D.f=f->next;