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]

On Nov 17, 11:27 am, [e-mail] wrote:

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]

oogie wrote:

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]

On Nov 18, 12:20 am, Juha Nieminen <[e-mail]:

oogie wrote:

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).

It's locale specific.

Note, on the other hand, that you cannot reliably pass a char to
the isupper() et al. functions in <cctypewithout 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).

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