why is i the standard counting variable?

This is a discussion on why is i the standard counting variable? within the C++ Programming forums, part of the General Programming Boards category; Also, there are still enough systems in use where the linker will only look at the first 6 or so ...

  1. #16
    Cat without Hat CornedBee's Avatar
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    Also, there are still enough systems in use where the linker will only look at the first 6 or so characters of any variable, so veryLongVariable1 and veryLongVariable2 are indistinguishable.
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    CornedBee

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  2. #17
    Yes, my avatar is stolen anonytmouse's Avatar
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    Quote Originally Posted by CornedBee
    Also, there are still enough systems in use where the linker will only look at the first 6 or so characters of any variable, so veryLongVariable1 and veryLongVariable2 are indistinguishable.
    Just for clarification, before everybody rushes to shorten all their variables, CornedBee's post was regarding external variables (those shared between files).

    In the context of a typical loop variable (ie. not external), I think the standard guaranteed minimum is 31 characters:
    Quote Originally Posted by C89 Draft
    The implementation shall be able to translate and execute at least one program that contains at least one instance of every one of the following limits:

    ...

    * 31 significant initial characters in an internal identifier or a macro name

    * 6 significant initial characters in an external identifier

  3. #18
    Cat without Hat CornedBee's Avatar
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    I wouldn't rush to shorten even my external variables. These systems have become very rare.
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    CornedBee

    "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."
    - Flon's Law

  4. #19
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    Quote Originally Posted by CornedBee
    I wouldn't rush to shorten even my external variables. These systems have become very rare.
    ... and the point of the standard is that a compliant C compiler, on such a system, would be required to do things in a way that resolves concerns for the linker without requiring the programmer to change source code.

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