int foo (int argc, …) vs int foo() vs int foo(void) in C

Question

So today I figured (for the first time admittedly) that int foo() is in fact different from int foo(void) in that the first one allows any

Answer 1

In standard conform C, you have to use int foo(void) if the function does not accept any parameters.

I guess it is compiler dependant what happens, when you pass arguments to a function with empty braces. But I don't think there is a way to access these parameters.

As for main, the only standard conform (pure c) ways to write them are either int main(void) or int main(int argc, char **argv) (or char *argv[] which is the same).