What are STL iterators in C++?

What are STL iterators in C++?

STL iterators are objects that allow you to traverse the elements of a container in C++. They provide a uniform way to access data.

Can you give me an example of how to use an iterator with a vector?

Sure! Here's a simple example:

#include <iostream>
#include <vector>

int main() {
    std::vector<int> vec = {1, 2, 3, 4, 5};
    for (std::vector<int>::iterator it = vec.begin(); it != vec.end(); ++it) {
        std::cout << *it << ' ';
    }
    return 0;
}

This code iterates through a vector and prints each element.

What are the different types of iterators available in the STL?

The STL provides several types of iterators:

1. Input Iterators
2. Output Iterators
3. Forward Iterators
4. Bidirectional Iterators
5. Random Access Iterators Each type has its own capabilities and use cases.

How do iterators differ from pointers?

Iterators are abstract representations of pointers that provide a way to access elements in a container. Unlike pointers, iterators can work with different types of containers and may not necessarily point to a memory address.