Answer to q6, midterm E02 practice questions

6. (25 pts) Together with this exam, there is a program (on a separate handout).
   

   Assuming each of the expressions below appeared in this program, indicate the type they would have, or write error if the expression is not valid, e.g.

   • dereferencing something with * or -> that isn't a pointer
   • a reference to a struct member that doesn't exist (e.g. d.foo where there is no foo)
   
   
   The first few are done for you as an example.

   Hints--for full credit:

   • don't write pointer to character; instead, write char *
   • don't write address of int; instead, write int *
   • don't write address of int * or address of pointer to int, instead write int **

   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