Is using char as a bool in C bad practice?

Question

Is there any downside to using

typedef char bool;
enum boolean { false, true };

in C to provide a semantic boolean type?

Answer 1

In C99, you should be using stdbool.h, which defines bool, true, and false.

Otherwise what you have is fine. Using just the enum may be a bit simpler, but if you really want to save space what you have works.