i can't make sense of almost all of the error messages... in fact i only understand one
perhaps the most crucial one (unless a gcc/g++ guru deigns to come down from his ivory tower and explain to you otherwise) is the last line of your post...
as acid kewpie guessed rightly, your iostream.h file is not present in your include directory on your installation...
so... it's time to either upgrade your rh6.0 to something more recent (since the later versions of the rh distro has more recent versions of gcc/g++) or go download latest gcc/g++ compiler and install it on your box...
or you could try doing this: :smash:
good luck!