This question is not an exact duplicate of the What should main () return in C and C++?. However, everything that it asks is already answered over there in greater detail and in greater quality, which makes this question a duplicate. This question is also problematic in its current state because it's not very focused, and is asking about system-specifics, historical changes, and all sorts of ...
If you are trying to close a question where someone should be using this idiom and isn't, consider closing as a duplicate of Why is Python running my module when I import it, and how do I stop it? instead. For questions where someone simply hasn't called any functions, or incorrectly expects a function named main to be used as an entry point automatically, use Why doesn't the main () function ...
In C90, main() must have an explicit return statement at the end to avoid undefined behaviour. In C99 and newer, you may omit the return statement from main(). If you do, and main() finished, there is an implicit return 0. Finally, there is nothing wrong from a standards point of view with calling main() recursively from a C program.
I have a lot of confusion around main tag of HTML. It describes content of the page but so does body. There should be only one main tag in the page. The body tag should also have one appearance in ...
What is the main tag in HTML5 ? How does it differ from body tag?
And then, to make it easier to switch between Unicode (UTF-16) and their multibyte character set, they've defined _tmain which, if Unicode is enabled, is compiled as wmain, and otherwise as main. As for the second part of your question, the first part of the puzzle is that your main function is wrong. wmain should take a wchar_t argument, not char. Since the compiler doesn't enforce this for ...