write a c++ program to solve:
[ 1, 2, 3, 4, 5]  →  [ 5, 4, 3, 2, 1]

#include <iostream>
using namespace std;

int main() {
  // define the variables
  int size;
  cout << "Enter array size: ";
  cin >> size;
  int a[size];

  // fill the array
  for (int i = 0; i < size; i++) {
    cout << "Enter the element at index (" << i << "): ";
    cin >> a[i];
  }
  for (int i : a) {
    cout << i << ", ";
  }
  cout << endl;

  // reverse the array
  for (int i = 0; i < size / 2; i++) {
    int tmp = a[i];
    a[i] = a[size - 1 - i];
    a[size - 1 - i] = tmp;
  }

  for (int i : a) {
    cout << i << ", ";
  }
  cout << endl;
}