Answers to Chapter 14 Review Questions
--------------------------------------

1. As arrays of characters, as pointers to characters, and as abstract
   units. 

2. C stores a null character ('\0') after the last data character to
   mark the end.

3. The following code processes the characters in a string treated as
   an array:

   for (i=0; str[i]!='\0'; i++) {
      ... body of the loop that manipulates str[i] ...
   }

   If instead the string is viewed as a pointer to a character, the
   following code as the same effect:

   for (cp=str; *cp!='\0'; cp++) {
      ... body of loop that manipulates *cp ...
   }

4. True, because the space for the string has already been set aside
   by the caller.

5. False, because declaring a local variable as a character array
   reserves space for the characters, while declaring is as pointer
   does not allocate any space beyond what is needed to hold the
   address.

6. Arrays cannot appear on the left side of an assignment and cannot
   be returned as the value of a function.

7. The storage of a local array is deallocated when the function
   declaring it returns.  If you return a pointer to that array, the
   caller then has a pointer to memory that is no longer available for
   use.

9. In the function call strcpy(s1, s2), s2 is the source and s1 is the
   destination. 

10.As with any function in the ANSI string.h interface, you must
   ensure that there is enough allocated memory in the destination
   string to hold the entire result.

11.Buffer overflow occurs when a program writes data past the end of
   an array.

13.The test strcmp(s1, s2) == 0 is how to determine if two strings are
   equal.