user defined sorting in c++ using comparator code example

Example 1: sort in descending order c++ stl

sort(arr, arr + n, greater<int>())

Example 2: stl for sorting IN C++

// STL IN C++ FOR SORING
#include <bits/stdc++.h> 
#include <iostream> 
using namespace std; 
int main() 
{ 
    int arr[] = {1, 5, 8, 9, 6, 7, 3, 4, 2, 0}; 
    int n = sizeof(arr)/sizeof(arr[0]); 
    sort(arr, arr+n);  // ASCENDING SORT
    reverse(arr,arr+n);   //REVERESE ARRAY 
    sort(arr, arr + n, greater<int>());// DESCENDING SORT
  }