🚀 go-pugleaf

I know I must be missing something trivial, but cannot see what it is.  The 
problem is this.

I am running gcc 2.7.0 on LINUX, FREEBSD and OS/2 WARP.  I have no problem 
compiling C programs, but there is a problem with C++.

After installing the compiler, I tested it with a trival C++ program

#include<iostream.h>

int main()

{
     cout << "Hi\n";
     return 0;
}
It compiles, but the linker complains with error messages

     undifined reference to _cout....
     undifined reference to _ostream...
I can compile to object code using gcc -c silly.cpp
to get silly.o, so the problem seems to be with the linker not the compiler.
What am I doing wrong here!!!!

Thanks.

Richard
United Arab Emirates University