2 ms·

Could someone break this down and explain it to me? [1] It looks hilariously atrocious yet interesting at the same time. [1]: http://stackoverflow.com/question

• ctdonath 14y ago
  #define as ;while ... do printf("n is %d\n", n) as ( n --> 0); Parses to (white space adjusted for clarity): do printf("n is %d\n", n); while ( n-- > 0);
• dmbass 14y ago
  The preprocessor replaces the macro "as" with ";while" creating a do-while loop. do { printf("%d",x); } while (x-- > 0);
• stephen_g 14y ago
  Basically, somebody sees some code with two operators (decrement and less than) with no whitespace between them and thinks it's a single operator. The answer that shows it with the brackets is probably the clearest: while ((x--) > 0) { ... } The compiler sees that as the same as (x--> 0) So it checks if x is more than zero and then decrements it each loop iteration.