check and convert lower character to upper character

[alessio211734]

How can I check in c++ string if a character is lower or upper?
Exist a function in c++ to convert string to upper characters?


Thanks in advance.

 

[oogie]

How can I check in c++ string if a character is lower or upper?
Exist a function in c++ to convert string to upper characters?

Thanks in advance.

The isupper(), islower(), toupper(), and tolower() functions should
handle this. You will need to also include the cctype header in your
code.

 

[Juha Nieminen]

The isupper(), islower(), toupper(), and tolower() functions should
handle this.

Note that they might not handle correctly characters outside the ASCII
range (such as ä, ö, etc).

 

[James Kanze]

Note that they might not handle correctly characters outside the ASCII
range (such as ä, ö, etc).

It's locale specific.

Note, on the other hand, that you cannot reliably pass a char to
the isupper() et al. functions in <cctype> without risking
undefined behavior. For this, you need the functions in
std::locale::ctype<char> (which is probably the better way to do
it anyway, although it can be awfully verbose).