Looping through the chars in a std::string an converting them to uppercase "in-place" (same memory address). Using C++11 features.

cpp11_string_iterator.cpp

#include <iostream>
#include <string>

using namespace std;

int main()
{
   string s("chris sederqvist");
   
   if (s.begin() != s.end())
   {   
      for(auto &t : s)
      {
         auto *tp = &t;       
	 *tp = toupper(*tp);
      }
   }
   cout << s << endl;
}

Just to show off some C++11 syntax.
I really like C++11's range for and iterators.