Thread: Odd printf behavior?

  1. #1
    Registered User
    Join Date
    Apr 2011

    Question Odd printf behavior?

    I just compiled the program below in Cyqwin and on codepad

    int main()
    int k=1;
    printf("%d, %d, %d\n", k, k++, k++);

    In both cases the output was

    3, 2, 1

    Shouldn't it be the other way around?

    Any thoughts would be welcome.

  2. #2
    and the hat of int overfl Salem's Avatar
    Join Date
    Aug 2001
    The edge of the known universe
    Read my answer here -> Comma Operator - C And C++ | Dream.In.Code

    Then understand that the code has undefined behaviour.
    If you dance barefoot on the broken glass of undefined behaviour, you've got to expect the occasional cut.
    If at first you don't succeed, try writing your phone number on the exam paper.

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