c++ - Calculating amount of elements in an array with a template function -

I was looking for a way to create a template function that used to calculate the amount of elements in an array, But this is just an indicator and so I came up with this:

  template & lt; Typename T & gt; Long int calculation elements (t * few more) {returns (psychof (t) / psychoph (& some array); };  

Now, my sense tells me that this should not work, but it does!

I have an array with 10 integers T a int , so will be sizeof (T) 4 , someArray will be an indicator for an integer array, therefore sizeof (and someArray) 10 times the size of an integer ( 10 * size (T) ), which would be 40 function should return to 0, but it is not.

Can anyone explain to me what I am doing?

Thank you.

This can work in the context of the array:

  template & Lt; Typename T, std :: size_t N & gt; Constexpr std :: size_t calculation elements (CONST T (& amp;) [N]) {return n; }  

.

Currently you come back to the sizeof (T) / sizeof (T **) which is divided by the size of the element, the size of a pointer (32 bits and 8 8 bits at 64 bits).