What are the best practices for using iterators in C++?

What are the best practices for using iterators in C++?

When using iterators in C++, it's important to follow best practices like ensuring iterator validity, using the right type of iterator for your needs, and avoiding iterator invalidation.

Can you explain what iterator invalidation means?

Iterator invalidation occurs when the underlying container is modified in a way that makes existing iterators unusable. For example, adding or removing elements can invalidate iterators.

What types of iterators are there in C++?

C++ has several types of iterators: input iterators, output iterators, forward iterators, bidirectional iterators, and random access iterators, each serving different purposes.

How can I avoid iterator invalidation?

To avoid iterator invalidation, you can use methods like reserving space in containers, using smart pointers, or iterating over a copy of the container.