Using a function and a loop to make a Fibonacci sequence

[E0p9LyTq]

The only real sticking point about long long is it was added with C++11. Before then long was the largest type the C++ standard had.

There have been posters here required to use older compilers, such as Turbo C, so creating C++11/14/17 compliant code won't work for those peeps.

Being stuck with such antiquated tools is only going to hurt them, though.