how to increase array memory in c++

To increase the memory of an array in C++, you need to follow these steps:

Declare a new array with the desired size: You can declare a new array with a larger size than the original array. For example, if you have an array called arr with size n, and you want to increase its memory, you can declare a new array with a larger size, let's say newSize.
Copy the elements from the original array to the new array: You need to copy the elements from the original array to the new array. You can use a loop or a function like std::copy to achieve this. Make sure to copy the elements in the correct order.
Release the memory of the original array: After you have successfully copied the elements to the new array, you should release the memory of the original array to avoid memory leaks. You can use the delete[] operator to release the memory allocated for the original array.
Assign the new array to the original array pointer: Finally, you need to assign the new array to the original array pointer. This ensures that the original array now points to the new array with the increased memory.

Here's an example that demonstrates these steps:

int increaseArrayMemory(int arr, int n, int newSize) {
    int* newArr = new int[newSize]; // Step 1

    std::copy(arr, arr + n, newArr); // Step 2

    delete[] arr; // Step 3

    arr = newArr; // Step 4

    return arr;
}

In this example, the function increaseArrayMemory takes the original array arr, its size n, and the desired new size newSize as parameters. It performs the four steps mentioned above and returns the new array with increased memory.

Please note that it's important to handle memory allocation and deallocation correctly to avoid memory leaks and undefined behavior. Make sure to release the memory of the original array after copying the elements to the new array.