how to sort array descending in c++ code example

Example 1: how to sort in descending order c++

int arr[10];
int length = sizeof(arr)/sizeof(arr[0]); 
sort(arr, arr+length, greater<int>());

Example 2: 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;
}