Why can't g++ find iostream.h?

Question

I\'m trying to understand how to compile C++ programs from the command line using g++ and (eventually) Clang on Ubuntu.

I found a webpage which explains MakeFiles an

Answer 1

has never been a standard C++ header, because it did not make it into the C++ standard.

Instead we got , in 1998.

Steer well clear of teaching material using non-standard stuff such as or void main.

However, as a practical solution for your current pre-standard code, you may try to replace

#include 

with

#include 
using namespace std;

It’s not guaranteed to work, but chances are that it will work.