Error while including header file

As part of modifying Rotor source code, I have to include iostream.h,
which is throwing several errors for me. It seems I dont get any errors
when I include other files like string.h/stdlib.h.  Can some one please
enlighten me: why are these errors thrown and what is the fix. Does it
have anything to do with library paths or make/source.inc files?I am new
to Windows platform and absolute new to Rotor, so I appreciate you being
elaborative


Few of the error messages are:
error C2065: 'cout' : undeclared identifier
error C2061: syntax error : identifier 'ostream'
 error C1083: Cannot open include file: 'iostream.h': No such file or
directory


Cheers,
Chris.