This is interesting, but I wouldn't say it is valid C. main() doesn't know about greet(aut...

irishcoffee • today at 4:42 AM • 2 replies • view on HN

This is interesting, but I wouldn't say it is valid C. main() doesn't know about greet(auto s) and wouldn't be able to call it in valid C89, right?

kevin_thibedeau • today at 5:15 AM

It's valid K&R since everything defaults to int. The linker will match the symbols sans prototype. That wasn't obsoleted until C23.

oguz-ismail2 • today at 5:03 AM

It is valid C89. greet is automatically declared as

    int greet();

at call site.

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