c++ toupper - standard function?

Question

Possible Duplicate:
Convert a String In C++ To Upper Case

Hi, I need a portable function to convert string in c++ to upper case. I'm now using toupper( char); function. Is it a standard function? If not, what it's the correct way to do it across platforms? Btw, is there any web / wiki where I can list all c++ standard functions? Thank you.

score 4 · Accepted Answer · edited Aug 25 '11 at 06:20

4

Yes, toupper is declared in the cctype header. You can transform a string with an algorithm:

#include <algorithm>
#include <iostream>
#include <string>
#include <cctype>

int main()
{
    std::string str("hello there");
    std::cout << str << '\n';

    std::transform(str.begin(), str.end(), str.begin(), std::toupper);
    std::cout << str << '\n';
}

edited Aug 25 '11 at 06:20

Sebastian Mach

37,451
6
88
128

answered Nov 17 '10 at 13:02

fredoverflow

246,999
92
370
646

you'll need the scope resolution operator – John Dibling Nov 17 '10 at 13:03
Is there any recommendation when to use toupper(char) and when toupper(char, locale)? – kangcz Nov 17 '10 at 13:09

score 1 · Answer 2 · answered Nov 17 '10 at 12:59

1

For the latter question, there's http://www.cplusplus.com/.

answered Nov 17 '10 at 12:59

Kos

67,875
23
165
229

score 0 · Answer 3 · answered Nov 17 '10 at 13:01

0

Hi in our project we use boost/algorithm/string to_upper function project for windows and linux

answered Nov 17 '10 at 13:01

Sanja Melnichuk

3,465
3
24
46

c++ toupper - standard function?

3 Answers3