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multiple nonlocal variables

This is a discussion on multiple nonlocal variables within the C++ Programming forums, part of the General Programming Boards category; a2 has a local scope. When main() returns, a2 ceases to exist. So that local scope is associated with the ...

  1. #16
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    a2 has a local scope. When main() returns, a2 ceases to exist. So that local scope is associated with the main() function. Some people describe this as "function scope"
    Right 98% of the time, and don't care about the other 3%.

    If I seem grumpy in reply to you, it is likely you deserve it. Suck it up, sunshine, and read this, this, and this before posting again.

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    Quote Originally Posted by grumpy View Post
    a2 has a local scope. When main() returns, a2 ceases to exist. So that local scope is associated with the main() function. Some people describe this as "function scope"
    Pardon if I'm missing the answer in that, but my question is which one is true:

    A local variable by definition has local scope, a non-local variable by definition cannot have local scope.
    So is this untrue then? [...]
    It is very true.
    or
    a = a + 2; //This uses a2; it is nonlocal to this block, but it has local scope and is currently the only a in scope

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    They are both true, although personally I would not have used quite the wordings that tabstop did.

    a2 is within the scope associated with the function main(), and hides a1 (at file scope). The body of the while loop within main() defines a new scope, That new scope is within the scope associated with main(), so can access a2 - another a (called a3) is introduced within that scope.
    Right 98% of the time, and don't care about the other 3%.

    If I seem grumpy in reply to you, it is likely you deserve it. Suck it up, sunshine, and read this, this, and this before posting again.

  4. #19
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    Quote Originally Posted by grumpy View Post
    They are both true, although personally I would not have used quite the wordings that tabstop did.

    a2 is within the scope associated with the function main(), and hides a1 (at file scope). The body of the while loop within main() defines a new scope, That new scope is within the scope associated with main(), so can access a2 - another a (called a3) is introduced within that scope.
    I don't like it either, but I was stuck with the nouns listed in the C++ standard.

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    Quote Originally Posted by tabstop View Post
    I don't like it either, but I was stuck with the nouns listed in the C++ standard.
    This is just one of those topics that are hard to express within the confines of the standard's grammer. Eh, I think the question has been answered, unless the OP has something else he is confused about.
    Quote Originally Posted by anduril462 View Post
    Now, please, for the love of all things good and holy, think about what you're doing! Don't just run around willy-nilly, coding like a drunk two-year-old....
    Quote Originally Posted by quzah View Post
    ..... Just don't be surprised when I say you aren't using standard C anymore, and as such,are off in your own little universe that I will completely disregard.
    Warning: Some or all of my posted code may be non-standard and as such should not be used and in no case looked at.

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