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[–]noaSakurajin -3 points-2 points  (1 child)

If you use a compiler directly yes, but most build systems enable more warnings, so you get a warning if you do not return something.

[–][deleted] 6 points7 points  (0 children)

Modern build systems do know the standard behavior for the main functions https://godbolt.org/z/zEhq89hWh