undefined | Better HN

0 pointsSomeone1y ago0 comments

> the K&R example is an example of explicitly undefined behavior in the C standard

You can’t blame K&R C for that. It predates “the C standard” by over a decade (1978 vs 1989)

When it was written, what K&R said was C.

0 comments

The second edition was released in 1988, and it was based on a draft of the first ANSI C standard, and even then, the line stating that this was undefined behavior was already present.

http://jfxpt.com/library/c89-draft.html#A.6.2

> A pointer to a function is converted to point to a function of a different type and used to call a function of a type not compatible with the original type (3.3.4).

layer81y ago

The example is still the same in the second edition of K&R, which is based on C89.

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