c 2b 2b get length of array

1int arr[5];
2int len = sizeof(arr) / sizeof(arr[0]);
3// returns 5

1int size = sizeof(arr)/sizeof(arr[0])

1// array::size
2#include <iostream>
3#include <array>
4
5int main ()
6{
7  std::array<int,5> myints;
8  std::cout << "size of myints: " << myints.size() << std::endl;
9  std::cout << "sizeof(myints): " << sizeof(myints) << std::endl;
10
11  return 0;
12}