int main()
{
int x[3] = {1, 34, 6};
int num_elements = CountElements(&x);
}
int CountElements(int * array)
{
// return the number of elements in array passed
}
Counting elements in an array passed to a function?
March 17, 2003 08:59 PM
Hello. I was wondering, suppose I''m passing an array to a function like so:
Of course this example is silly but it simple and illustrates the point: since array is simply a pointer to the first element in, in this case, x[], is there any way that CountElements() could possible know how many elements are in that array? I figured I could do a simple sizeof() on the whole array, and then a sizeof() on one element, and then devide the two. However, how is CountElements() possibly to know how large array is if it doens''t know where it ends?
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606
March 17, 2003 09:02 PM
You can''t do it. When passing an array as a parameter, you will also have to pass its length - or better yet, use a vector rather than a raw array.
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