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.

Answer 1

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';
}