Do you #define booleans?

Do you? What's wrong with simple one and zero?

>>52
Each definition may be expanded not more than once.
Also, you can't have `#define "one" something`.

    #define one two
    #define two three
    #define three one // comment this line to see that the stuff is really expanded.
    #define stringize(s) #s
    #define stringize_expand(s) stringize(s)
    printf("%s", stringize_expand(one));