Thread: Casting

  1. #1
    Registered User
    Join Date
    Oct 2002


    Just wondering like, is there any difference between
        double d = 12.3456;
        cout << (int) d << endl;
        double d = 12.3456;
        cout << static_cast<int>(d) << endl;
    besides one is a hell of alot shorter to write ? static_cast<> is supposedly a c++ cast while () is more of a c-style cast but does it really matter. Tryed looking through the board but couldnt find any answers. Thanks for any input.

  2. #2
    Registered User
    Join Date
    May 2003
    I prefer the second style. The first is ambiguous -- it can mean any of three different kinds of casts, and which cast is done is up to the compiler to decide. The second is safer, it checks if that cast is legal.

  3. #3
    Just because ygfperson's Avatar
    Join Date
    Jan 2002
    I don't think there is a difference. It's just a style thing. It only really matters when you cast pointers to more derived classes.

  4. #4
    Cat without Hat CornedBee's Avatar
    Join Date
    Apr 2003
    There's no execution difference. But the static_cast is far easier to find if you're ever looking for casts in your source. Just load it in a text editor and search for [a-z]*_cast. If you're looking for a C-style cast you're going to have problems. () is just too common.
    All the buzzt!

    "There is not now, nor has there ever been, nor will there ever be, any programming language in which it is the least bit difficult to write bad code."
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