c++20 Directory Reference

Files
file	c++20/exercise-2-1.hpp [code]
	Solution to Exercise 2-1 (C++20).
file	c++20/exercise-2-2.hpp [code]
	Solution to Exercise 2-2 (C++20).
file	c++20/exercise-2-4.hpp [code]
	Solution to Exercise 2-4 (C++20).
file	c++20/exercise-2-5.hpp [code]
	Solution to Exercise 2-5 (C++20).