Advanced C Programming
                                           Spring 2004


Excercise 8 (Splitting a word into two bytes using different methods)
         
       
       For many devices some information (for example a 16 bit
       integer number) has to be transmitted  in two separate
       parts: for example first the low byte and after that
       the high byte. On the other hand a device can send
       a 16 bit integer as two separate parts in similar way.
       In the class we studied several methods to construct
       a word from two bytes. Use now the same basic principles 
       "to another direction". This means that you have to split
       a word into two bytes.
       
       Write a program which reads from the keyboard a 16 bit word
       and splits it into two 8 bit bytes (value between
       0 - 255). 

       There are many different techniques you can use to solve
       this problem. Now you have to use 4 methods examined 
       in the class. The methods need to be applied to other
       direction now. Write only one program. Display results from
       every method separately on the screen.
       
       The four techniques, you have to use are: 
         1) "Basic programmer's way".
         2) Union data type is used.
         3) Access bytes directly by using pointers and type casting 
            to BYTE (without any additional types like union or struct).
         4) write a macro (bit-wise operations shifting, masking ...).