Exploring C++20: The Programmer's Introduction to C++

© Ray Lischner 2020

R. LischnerExploring C++20https://doi.org/10.1007/978-1-4842-5961-0_18

18. Character Categories

Ray Lischner¹ 

(1)

Ellicott City, MD, USA

 

Exploration 17 introduced and discussed characters. This Exploration continues that discussion with character classification (e.g., uppercase or lowercase, digit or letter), which, as you will see, turns out to be more complicated than you might have expected.

Character Sets

As you learned in Exploration 17, the numeric value of a character, such as 'A', depends on the character set. The compiler must decide which character set to use at compile time and at runtime. This is typically based on preferences that the end user selects in the host operating system.

Character-set issues rarely arise for ...