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Re: Weird result for modulus operation

Andrew Pinski wrote:
On Tue, Apr 29, 2008 at 9:08 PM, Ang Way Chuang <wcang@nav6.org> wrote:
Thanks for the speedy reply. But why this code:

        int a = 17, b = 16;
        a = a++ % 16;

 results in a = 2 then? I think I need to know what is sequence point. I'll
google that.

As I mentioned, the code is undefined so it could be any value.

Is there any flag in gcc that can provide warning to code that relies on undefined behaviours?


Thanks,
Andrew Pinski


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