Is typedef char BUFFER[20] legal?

[Paul Siu]

Is the following statements legal in K&R C, and ANSI C?

     typedef char BUFFER[20];
              .
              .
              .
     BUFFER sb;

This seems to work on both the K&R compiler and the ANSI compiler at my work
place, but is this going to break when the program is ported?

Can anyone also tell me what is the most common style convention for type
names, I usually put them all in capitals.

Thanks

Paul Siu
paul at tredysvr.tredydev.unisys.com