What does "%:" (percent colon) mean in C?

Asked Dec 18 '19 at 21:59

Active Dec 18 '19 at 21:59

Viewed 65 times

In one of my courses I've been given this cryptic c code.

%:define BBRACE (
%:define BRACEE )
%:define CCURLY_BRACE {
%:define CURLY_BRACEE }
%:define SEMICOLON ;
%:define COMMA ,
int main BBRACE int argc COMMA char *argv<::> BRACEE CCURLY_BRACE return 1^2^3^4^5^6^7 SEMICOLON CURLY_BRACEE

Its not that complicated but I've never seen %:define ... is there any difference to #define ...? I found nothing about %:online.

Same goes with char *argv<::> but I don't know if this really deserves a second question.

asked Dec 18 '19 at 21:59

iaquobe

1

I think the macros are even worse than the digraphs. Blech! – Fred Larson Dec 18 '19 at 22:07
3

In the spirit of the thing, it should be `%: define CCURLY_BRACE <%` – Mad Physicist Dec 18 '19 at 22:16
1

Or better yet, `??=define CCURLY_BRACE ??<`, and `return 1 ??' 2 ??' 3 ??' 4 ??' 5 ??' 6 ??' 7 SEMICOLON` – Mad Physicist Dec 18 '19 at 22:18

What does "%:" (percent colon) mean in C?

0 Answers0