How to reliably get size of C-style array?

Question

How do I reliably get the size of a C-style array? The method often recommended seems to be to use sizeof, but it doesn\'t work in the foo function

Answer 1

Since c++11, there is a very convenient way:

static const int array[] = { 1, 2, 3, 6 };
int size = (int)std::distance(std::begin(array), std::end(array))+1;