Converting string to integer

Hello experts,

How can I convert a string (of type string, not char*) into an integer?
Is there an API function for this? atoi works only on char*, however, converting all the strings to char* won't be efficient (I have a lot of strings :-) )

Any suggestions?
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Using c_str casts the string to a const char *, so you could say:
std::string s = "231";
int i = atoi(s.c_str());

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
By the way, c_str just lets you get at the underlying buffer's char *, it doesn't create a new one or anything, so the efficiency is probably close to as good as you can get.
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.

Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.