What are some examples of dynamic arrays in C++?

What are some examples of dynamic arrays in C++?

Dynamic arrays in C++ can be created using pointers and the new keyword. For example, you can allocate an array like this: int* arr = new int[size];.

Can you show me a complete example of using a dynamic array?

Sure! Here's a simple example:

#include <iostream>
using namespace std;

int main() {
    int size;
    cout << "Enter the size of the array: ";
    cin >> size;
    int* arr = new int[size];

    for (int i = 0; i < size; i++) {
        arr[i] = i * 2; // Assigning values
    }

    for (int i = 0; i < size; i++) {
        cout << arr[i] << " "; // Printing values
    }

    delete[] arr; // Don't forget to free memory!
    return 0;
}

What happens if I forget to delete the dynamic array?

If you forget to delete the dynamic array, it will lead to a memory leak, meaning that the memory allocated for the array will not be freed until the program terminates.

Are there any alternatives to dynamic arrays in C++?

Yes, you can use std::vector from the Standard Template Library (STL), which manages memory automatically and provides dynamic resizing.