Homework question PLEASE HELP!

[Catfish]

Only kidding.

What is the best way for getting the last element of a C++ std::string? I can think of two methods but I'm unsure whether the second is reliable. Any suggestions?

Thanks in advance.

// version 1
str[str.size() - 1];

// version 2 -- are there situations when this might not work?
*(str.end() - 1);

[Disch]

option 3:

str.back();

All 3 will work fine, as long as the string contains at least 1 character.

If you try to do any of these on an empty string, they will all fail / possibly crash.


EDIT:

Crap... does string have a back() function? I just assumed it did, but maybe not.