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comp.lang.c FAQ list · Question 11.35

Q: People keep saying that the behavior of i = i++ is undefined, but I just tried it on an ANSI-conforming compiler, and got the results I expected.

A: A compiler may do anything it likes when faced with undefined behavior (and, within limits, with implementation-defined and unspecified behavior), including doing what you expect. It's unwise to depend on it, though.

Here is another way of looking at it, due to Roger Miller:

``Somebody told me that in basketball you can't hold the ball and run. I got a basketball and tried it and it worked just fine. He obviously didn't understand basketball.''

See also questions 7.3b, 11.32, 11.33, and 11.34.

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