Hi I'm new to c++ I've written a selection sorting program can you help me and say in swap function why we put the stars(\*), and in selectionSort we should use & in <<swap(&arr[min], &arr[i]);>>
i mean cant we just say:

```
int newint = a;
  a = b;
  b = newint;

```

instead of:

```
int newint = *a;
  *a = *b;
  *b = newint;

```

main code:

```
using namespace std;
void swap(int *a, int *b);
void selectionSort(int arr[], int size);
void printArray(int arr[], int size);

int main() {
    int arr[] = {20, 12, 10, 15, 2};
    int size = sizeof(arr) / sizeof(arr[0]);
    selectionSort(arr, size);
    cout << "Sorted array in Acsending Order:\n";
    printArray(arr, size);
}
// ================================================
// swap function to swap two element of the array
void swap(int *a, int *b){
  int newint = *a;
  *a = *b;
  *b = newint;
}
// ================================================
// the selection function made of two main loop
void selectionSort(int arr[], int size) {
    for (int i = 0; i < size - 1; i++) {
        int min = i;
        for (int j = i + 1; j < size; j++) {
            if (arr[j] < arr[min])
                min = j;
            }
        swap(&arr[min], &arr[i]);
        }
    }
// ================================================
// print function to show the final result
void printArray(int arr[], int size) {
    for (int i = 0; i < size; i++) {
        cout << arr[i] << " ";
    }
    cout << endl;
}

```