C++ Counting number of elements an array can hold

Hi I'm trying to get some skills in C++.  I'm a total newbie here.  So I'm trying to write a function that will count the number of elements that an array can hold without using a variable to hold this number.

I know in java I could say something like  array.length();  I think this is also possible in C++, something like sizeof *array, but is there a way to calculate the size of the array without using sizeof or using a variable to hold the number?