reverse the order in cpp code example

Example 1: reverse sort cpp

int main(){    
  	int arr[5] = {1,3,2,4,5};
	sort(arr, arr+5, greater<int>()); 
  	// arr == {5,4,3,2,1}
  	return 0;
}

Example 2: reverse an array in cpp

#include<iostream>
using namespace std;
int main()
{   
     int n=3;
     int arr[]={1,2,3,4};
      while (n>=0)
    {
        cout<<arr[n];
        n--;
      }
         
    return 0;
}