Question

Pass an array to a function using a pointer and return one using a pointer in C++

I left it open for you to decide how to approach it in simple terms please use comments so I can follow along.

Answer 1

#include <iostream>
using namespace std;

/**
 * duplicates and returns a new copy of the array
 * @param arr array passed into the function
 * @param size of the array
 * @return new copy of the array
 */
int *duplicate_array(int *arr, int size) {
    int *dup = new int[size];
    for (int i = 0; i < size; ++i) {
        dup[i] = arr[i];
    }
    return dup;
}

int main() {
    int arr[] = {2, 9, 1, 4, 3};
    int *dup = duplicate_array(arr, 5);

    // print duplicate array
    for (int i = 0; i < 5; ++i) {
        cout << dup[i] << " ";
    }
    cout << endl;
    return 0;
}