how to sort set in descending order 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: how to sort in descending order in c++

sort(str.begin(), str.end(), greater<int>());
cout<<str;