Swapping first and last Characters

[alphawolf7]

Is there any way to swap first and last characters? If I had a string called hello, would it be possible to make it "oellh" just by swapping the first and last characters?

[Cubbi]

Swap can be done with swap(), the first character is the one at begin() and the last is the one at rbegin():

#include <iostream>
#include <string>
#include <algorithm>
int main()
{
    std::string s = "hello";
    std::iter_swap(s.begin(), s.rbegin());
    std::cout << s << '\n';
}

demo: http://ideone.com/BvVg2