Topics for second midterm exam
------------------------------
Will largely focus on chapters 6 & 7

Structures
----------
    defining
    declaring
    passing as parameters / returning as values
    arrays of structures
    pointers to structures
    self-referential structures

Typedef

Unions (minor if at all)

Bit fields (minor if at all)

Standard I/O
------------
    basics of stream interface
    opening a stream
    getting input from a stream
    formatted input from a stream
    formatted output to a stream

Basic error handling

Questions related to assignments

    - format
    - sort
    - additup
    - huffman compression

Shell scripting
---------------
- basics of
    - sha-bang
    - permissions
    - comments

filename globbing

environment variables

command line argument variables and shift

Basic control structures:  for, while, until, if-then-else, switch

test and expr

regular expression patterns
    .   [] [^]  ^   $   *   \(\)    \{\}