Welcome to C++! I know this is a gcc maillist and not one for C++ specifically, but I'm going to clarify things using the C++ standard. I highly recommend you get a copy of this and get used to referencing it - it's heady stuff, and overwhelming at first (and for some time afterward), but it is the standard and can steer you clear of a LOT of "well-intentioned-but-bad" advice available on the web and in forums. To help you sort through things from a practitioner's (rather than "language lawyer") perspective, there are a few good references - I use C++ Primer (now in 4th ed., by Lippman, Lajoie, and Moo) most often. As was previously pointed out, cout is an object, not a function. You need to "#include <iostream>" to pick up the definition - see C++ Std - 27.3. As was also pointed out, C++ std library include files don't have an extension (officially, again, certain implementations continue to support legacy, non-standard extensions). (C++ Std. 17.4.1.2) In addition, although it will work with "#include <stdio.h>", I'd recommend using "#include <cstdio>" and change the printf to std::printf. (Or simply declare "using namespace::std;" and drop all the "std::" prefixes. When you get a chance, you may want to look at "namespaces" in a good C++ reference. See appendix D - D.5 in the C++ std and section 17.4.1.2 for details. Finally, as a good programming practice, do not rely on the "implicit int return" - declare main as "int main( )". BTW - you may see a lot of examples out there with different prototypes/signatures for main - there are only two "official" signatures for this function (and "int main( )" is one of them) - see C++ Std - 3.6.1 paragraph 2.
