Re: How to determine the Number of Elements in an Array?

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#9486

From: Dennis Jones
Date: Mon, 05 Jul 2004 15:36

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"PC Hua" <home-AT-huaonline.DOT.com> wrote in message
news:opsam505lcpmxkmr@newsgroups.borland.com...
> I have something like...
>    std::string SomeStr[]={"a","b","c"};
> I want to run through all elements. How can I get the size of the list
> (number of elements)?

As Andrue has already said, you can do this:

number of elements = sizeof( SomeStr ) / sizeof( SomeStr[0] )

HOWEVER, this will only work for a static array -- that is, an array whose
size is defined at compile-time.  The only way to determine the number of
elements in an array whose size is not static is to use a sentry value as
the last element.  Then you iterate through the array, counting elements as
you go, and stop when you get to the sentry value.

- Dennis

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Subject: Re: How to determine the Number of Elements in an Array?
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