Question

I just installed Ubuntu and tried making the famed “Hello World” program to make sure that all the basics were working. For some reason though, g++ fails to compile my program with the error: “‘cout’ is not a member of ‘std'”. I’ve installed the build-essential package. Am I missing something else?

#include <iostream.h>

int main() {
   std::cout << "Hello World!" << std::endl;
   return 0;
}

Looks pretty good to me…

Answer 1

Use #include <iostream> – iostream.h is not standard and may differ from the standard behaviour.

See e.g. the C++ FAQ lite entry on the matter.