How to display reversed values in array using pointers? [duplicate]

I am learning C++ by myself through Udemy courses, and now thanks to some good advice I'm using a book "C++ Primer".

I will show you one of my codes. Please give me any advice on my route to programming, and why it does not work. It does not show the values in reversed manner using pointers.

#include <iostream>
using namespace std;
using std::cin;
using std::cout;
using std::endl;

 
void reverse_array (int *arr, int size)
{
    int *start = arr;  
    int *end = arr + size -1;

    while (start < end)
    {
        int temp = *start;
        *start = *end;
        *end = temp;
        start ++;
        end --;
    }
}

int main ()
{
    int arr [] {1,2,3,4,5,6,7};
    int size = sizeof(arr)/ sizeof(arr[0]);

    reverse_array (arr,size);

    cout << reverse_array << endl;
}