What is the role of do...while(0) loop role in this macro

Asked Apr 09 '22 at 12:10

Active Apr 09 '22 at 12:17

Viewed 27 times

I'm trying to understand what is the role of the do...while loop in this macro.

#define err_msg(msg) \
    do { \
        perror(msg); \
        exit(1); \
    } while (0)

Could you help me figure it out?

edited Apr 09 '22 at 12:17

Jonathan Leffler

asked Apr 09 '22 at 12:10

That is used to encapsulate a block of code within a `{ }` pair, in `C` `do-while` loop with condition `0` will be executed once. – Darth-CodeX Apr 09 '22 at 12:40

0 Answers0