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

This c++ function always returns the upper case string...

#include  
#include 
using namespace std; 
string toUpper (string str){
    locale loc; 
    string n; 
    for (string::size_type i=0; i