> switch (i) case 1: puts("i = 1"); I've seen this in the wild, particularly with macros. #define assert(c) if (!c) ... if (foo) assert(...);

> switch (i) case 1: puts("i = 1"); I've seen this in the wild, particularly with macros. #define assert(c) if (!c) ... if (foo) assert(...); else bar(); // oops!