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A comment on Hello World, 1978. Parent comment

Re:Hello World, 1978 by tacostakohashi on Monday January 04, 2016 @08:13AM (#10835408)
There were no function prototypes in K&R C, these were added in the ANSI C89 standard.

Even now, prototypes are optional in C (as opposed to C++), so this program is still valid, although it's likely to trigger some compiler warnings.

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Re:Hello World, 1978 by cygx on Monday January 04, 2016 @09:22AM (#10835729)
Even now, prototypes are optional in C

It's been illegal in standard C since 1999.

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