c++ - How to get the size of an Array?

In C# I use the Length property embedded to the array I'd like to get the size of.
How to do that in C++?

Answer

Arrays in C/C++ do not store their lengths in memory, so it is impossible to find their size purely given a pointer to an array. Any code using arrays in those languages relies on a constant known size, or a separate variable being passed around that specifies their size.

A common solution to this, if it does present a problem, is to use the std::vector class from the standard library, which is much closer to a managed (C#) array, i.e. stores its length and additionally has a few useful member functions (for searching and manipulation).

Using std::vector, you can simply call vector.size() to get its size/length.