C++ on Linux not recognizing commands like exit() and printf()

Question

I get these errors after issuing a g++ command on a .cpp file: error: ‘exit’ was not declared in this scope error: ‘printf’ was not declared in this scope

The problem is that when I compiled this program on another linux machine, everything went fine. I tried searching around, but all I found was that I need to include files like 'stdlib.h'.

Could it be I'm missing some library on my OS? If so, what might it be?

Answer 1

Recent versions of GCC have gotten stricter in what responsibilities the programmer needs to fulfill. Include the cstdlib, cstdio, etc. header and access these functions from the std namespace.

Answer 2

Specifically for ‘exit’ was not declared in this scope all you need is:

#include <stdlib.h>