Prefer the standard to the offbeat.
– Strunk & White
The standard library offers character classification operations in <cctype> (§36.2), strings with associated operations in <string> (§36.3), regular expression matching in <regex> (Chapter 37), and support for C-style strings in <cstring> (§43.4). Handling of different character sets, encodings, and conventions (locales) is discussed in Chapter 39.
A simplified string implementation is presented in §19.3.