How to set boolean function in c++ in xcode program?

Question

Programming

I'm trying to write a c++ function that returns a bool, for example bool Positive(double X); writes that it should be void. What to do?

Answer 1

Try

#include <stdbool.h>
#define BOOL bool

Answer 2

[shaman]
most likely you have void in *.h, and in *.c you replaced void with bool, so the compiler swears
[/shaman]
show the code :)

Answer 3

If it comes to that, then you can always use int instead of bool, under the hood it's the same thing, it's just a little clearer for people.