I'm confused. main doesn't take void--it takes two arguments. The f() syntax means that the definition doesn't specify how many arguments the function will be called with, while f(void) means it takes no arguments.
As per the standard, main() can take no argument [ie, main(void)] or 2 arguments [main (int, char asterisk asterisk) or equivalent] or some implementation defined manner. See 5.1.2.2.1 in C2x working draft[0].
Wow, it is painful to see that they still haven't accepted case ranges. They are supported by gcc, clang, and icc. Like so:
case 123 ... 456:
Switching on strings is another thing people have been wanting for half a century. It would seep up many programs, because most programmers don't bother to generate a perfect hash or a carefully-balanced tree of "if".
