Exit function On Linux

When rea开发者_JAVA百科ding/writing a file in my application, I want to exit(1) if the file is not closed correctly. On Windows it works well, but on Linux this error appears:

‘exit’ was not declared in this scope

How can I solve that?

Thanks.

If this is in C, did you #include <stdlib.h>?

If this is C++ you have to include cstdlib:

#include <cstdlib>