C++: Vector Iterators vs Indexing

What are the main differences between using iterators and indexing with C++ vectors?

The main differences include syntax, performance, and safety. Iterators provide a more abstract way to traverse containers, while indexing is more straightforward but can lead to out-of-bounds errors.

Can you give me an example of using both methods?

Sure! For indexing, you might use vec[i] to access elements. For iterators, you would use something like for(auto it = vec.begin(); it != vec.end(); ++it) { /* access *it */ }.

Which method is generally preferred in modern C++?

Iterators are often preferred in modern C++ because they work seamlessly with algorithms and can be safer, especially with complex data structures.

Are there any performance differences I should be aware of?

In most cases, the performance difference is negligible for small vectors. However, iterators can be more efficient with larger data structures or when using algorithms from the STL.