pointer 61 missing/alloca.c extern pointer xmalloc(); pointer 142 missing/alloca.c pointer pointer 165 missing/alloca.c xfree ((pointer) hp); /* collect garbage */ pointer 181 missing/alloca.c register pointer new = xmalloc (sizeof (header) + size); pointer 191 missing/alloca.c return (pointer)((char *)new + sizeof(header));