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

Do you have ASCII or International characters in strings?

If it's the latter case, "uppercasing" is not that simple, and it depends on the used alphabet. There are bicameral and unicameral alphabets. Only bicameral alphabets have different characters for upper and lower case. Also, there are composite characters, like Latin capital letter 'DZ' (\u01F1 'DZ') which use the so called title case. This means that only the first character (D) gets changed.

I suggest you look into ICU, and difference between Simple and Full Case Mappings. This might help:

http://userguide.icu-project.org/transforms/casemappings