Convert a String In C++ To Upper Case

Question

How could one convert a string to upper case. The examples I have found from googling only have to deal with chars.

Answer 1

Use a lambda.

std::string s("change my case");

std::locale locale;
auto to_upper = [&locale] (char ch) { return std::use_facet>(locale).toupper(ch); };

std::transform(s.begin(), s.end(), s.begin(), to_upper);