Computer Science 215
                               Quiz 4      Name ______________________

1. Fill in the FINAL values in the table below after ALL of the
   code shown has completed execution:
                                                   x = 22;
    name      value     address                    y = 9;
    ------------------------------                 p = &x;
    int x  |         |   120                       r = &y;
    ------------------------------                *p = *r;
    int y  |         |   116                      *r = x;
    ------------------------------                 p = r;
    int *p |         |   112
    ------------------------------
    int *r |         |   108
    ------------------------------

2. Suppose the following declarations are made in a program to be
   run on an Intel x86 computer.

   char  *x;
   short *y
   long  *z;

   a. Each of the three pointer      b. The three pointer variables consume
      variables consumes 4 bytes        1, 2, and 4 bytes respectively
      of space.

   c. Each of the three pointer
      variables consumes 1 byte
      of space.

3. Which best characterizes the behavior of the following program:

   main()
   {
     int* p;
     *p = 99;
     printf("The value is %d \n", *p);
   }

   a. The program is correct and        b. The program is incorrect
      should be expected to work           and will fail in all environments
      fine in all environments             before the printf() is executed

   c. The program is incorrect, but
      it may appear to work correctly.


4. The proper way to use fread to copy stdin to stdout until end of file is:

   a.   while (len = (fread(buff, 1, 1024, stdin) != 0))
           fwrite(buff, 1, len, stdout);

   b.   while ((len = fread(buff, 1, 1024, stdin)) != 0)
           fwrite(buff, 1, len, stdout);

   c.   while (len = fread(buff, 1, 1024, stdin) != 0)
           fwrite(buff, 1, len, stdout);

   d.  All of the above are equivalent and correct.