// This example (part of a series) illustrates how to to use a functor,
// except that it uses a range-based for loop, instead.

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

using namespace std;

int main() {
    string name = "Beverly Hills Chihuahua";

    for (char &c : name)	    // note the & for reference
	c = toupper(c);

    cout << name << '\n';
}