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Thread: Why there is an underscore in front of some C++ functions?

  1. Oct 31st, 2001, 12:40 PM #1
    transcendental
    transcendental is offline

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    Question Why there is an underscore in front of some C++ functions?

    As above.

    for example _atoi64()

    Is there any special meaning behind it?

    thanx in advance.
    I'm a VB6 beginner.
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  2. Oct 31st, 2001, 12:59 PM #2
    jim mcnamara
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    It's not standard - specific to VC++ _msize() for example.

    Some standard C functions exist as slightly different implementations in C++, so this warns somebody who is try to write portable code.
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