Where is iostream.h in red hat linux 9 is it in the gcc?here is the list of my headers.Is there a place where i can download linux headers?

ls /usr/include
acl expat.h libgen.h panel.h symcat.h
aio.h fam.h libiberty.h paths.h sys
aliases.h fcntl.h libintl.h pci syscall.h
alloca.h features.h libio.h poll.h sysexits.h
ansidecl.h fenv.h libuser popt.h syslog.h
a.out.h FlexLexer.h libxml2 printf.h tar.h
apm.h fmtmsg.h limits.h protocols tclDecls.h
argp.h fnmatch.h link.h pthread.h tcl.h
argz.h form.h linux pty.h tclPlatDecls.h
ar.h fpu_control.h locale.h pwd.h tcpd.h
arpa fstab.h lockdev.h python2.2 termcap.h
asm fts.h ltdl.h readline term.h
assert.h ftw.h malloc.h re_comp.h termio.h
attr g++-3 math.h regex.h termios.h
baudboy.h _G_config.h mcheck.h regexp.h tgmath.h
bfd.h gconv.h md5global.h resolv.h thread_db.h
bfdlink.h gdbm md5.h rpc time.h
bits gdbm.h memory.h rpcsvc tkDecls.h
byteswap.h gdkcardimage menu.h rpm tk.h
c++ getopt.h metacity-1 sasl tkPlatDecls.h
complex.h glob.h mikmod.h sasl.h ttyent.h
cpio.h gmp.h mntent.h saslplug.h ttylock.h
crack.h gmp-mparam.h monetary.h saslutil.h ucontext.h
crypt.h gnome-xml mp.h sched.h ulimit.h
ctype.h gnu ncurses scsi unctrl.h
curl gnu-versions.h ncurses.h search.h unistd.h
curses.h gpm.h net security usb.h
cxx_common.h grp.h netash semaphore.h ustat.h
cxx_except.h hesiod.h netatalk setjmp.h utempter.h
db_185.h hmac-md5.h netax25 sgtty.h utime.h
db4 iconv.h netdb.h shadow.h utmp.h
db_cxx.h ieee754.h neteconet signal.h utmpx.h
db.h ifaddrs.h netinet slang values.h
dirent.h inttypes.h netipx sp vorbis
dis-asm.h iwlib.h netpacket spawn.h wait.h
disptmpl.h kudzu netrom srchpref.h wchar.h
dlfcn.h langinfo.h netrose stab.h wctype.h
elf.h lastlog.h newt.h stdint.h wordexp.h
endian.h lber.h nfs stdio_ext.h xlocale.h
envz.h lber_types.h nl_types.h stdio.h zconf.h
err.h ldap_cdefs.h nss.h stdlib.h zlib.h
errno.h ldap_features.h obstack.h string.h zutil.h
error.h ldap.h ogg strings.h
eti.h ldap_schema.h openssl stropts.h
execinfo.h liba2ps.h panel-2.0 swig.h

I'm not sure about RedHat 9, but you could try the command:

copy and paste that if you can. That should find all files with 'iostream.h' in the titles.

Thanks i found it