What are C++ array iterators and how do I use them?

What are C++ array iterators and how do I use them?

C++ array iterators are objects that allow you to traverse through the elements of an array. They provide a way to access elements without exposing the underlying structure.

Can you show me an example of how to implement an array iterator?

Sure! Here's a simple example:

#include <iostream>
using namespace std;

class ArrayIterator {
    int* arr;
    int size;
    int index;
public:
    ArrayIterator(int* array, int s) : arr(array), size(s), index(0) {}
    bool hasNext() { return index < size; }
    int next() { return arr[index++]; }
};

int main() {
    int arr[] = {1, 2, 3, 4, 5};
    ArrayIterator it(arr, 5);
    while (it.hasNext()) {
        cout << it.next() << " ";
    }
    return 0;
}

This code defines an ArrayIterator class that can iterate through an integer array.

What are the advantages of using iterators over traditional indexing?

Using iterators can enhance code readability and maintainability. They abstract the underlying data structure, allowing you to change the implementation without affecting the code that uses the iterator.

Are there any built-in iterators in C++?

Yes, C++ provides built-in iterators for standard containers like std::vector, std::list, and std::array. You can use them with algorithms from the Standard Template Library (STL).