🚀 go-pugleaf

A discussion of declaring main as returning void in comp.lang.c lead me
to read 5.1.2.2.1 "Program startup" in my ISO standard.  According to this
section, main can be declared as:

int main(void) { ... }
int main(int argc, char *argv[]) { ... }

Are the following also legal, although not explicitly mentioned?

int main()  { /* non-proto declaration */ }
main()  { /* non-proto declaration */ }
main(void) { /* implicit int */ ... }
int main(int argc, char **argv) { /* char **argv;  not char *argv[] ... }

Yes, I realize this sounds like a dumb question, but the standard doesn't
seem very precise. It implies that only the first 2 are legal.

Regards,
David Spuler
--
David Spuler, James Cook University of North Queensland, Australia
Author of "Comprehensive C", Prentice-Hall, 1992, pp416, ISBN  0-13-156514-1
INTRO TOPICS: types, operators, structures, strings, fns, ptrs, files etc etc
ADVANCED TOPICS: efficiency, debugging, style, portability, large programs