Size not declared

[POMPOMBALLS]

Check your compiler version.

Using std::size

I have found that many still have issue using std::size() general template function. As mentioned on C++ reference, std::size was implemented in C++17. Now, the difference comes with the compiler used when using the said implementation. Assume following example. #include <iostream> int main() { int numbers[] = {10, 20, 30, 40, 50}; std::cout << std::size(numbers); return 0; } The example works on C++17 (GCC) and newer versions (C++20)). But it does not work on C++17…