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

I use this solution. I know you're not supposed to modify that data area.... but I think that's mostly for buffer overrun bugs and null character.... upper casing things isn't the same.

void to_upper(const std::string str) {
    std::string::iterator it;
    int i;
    for ( i=0;i