can some pro quickly explain what's the use of extern keyword?
sometimes i see a function declared as:
extern int myFunc();
what does the extern do there?
Printable View
can some pro quickly explain what's the use of extern keyword?
sometimes i see a function declared as:
extern int myFunc();
what does the extern do there?
It is redundant and not necessary (for function prototypes, as in your case).Quote:
Originally Posted by ilikepure
The only reason you would be using extern is if you were using global variables across modules. And global variables, as most people agree, are a bad thing, so if you see the word "extern" you should probably be thinking "bad code," or at least code that could be improved.
EDIT: Of course, there is the extern "C" thing, but that's just the extern keyword hacked into a new role. If you aren't calling C code from C++ code, there is no need for it.