C++ sort() Sorts an array of integers

#include <iostream>
#include <algorithm>
using namespace std;
// array of numbers
int arr[] = {45, 2, 22, -17, 0, -30, 25, 55};
int main()//from   w  w  w  .  ja  v a2 s .  c  om
{
   sort(arr, arr+8);           // sort the numbers
   for(int j=0; j<8; j++)      // display sorted array
      cout << arr[j] << ' ';
   cout << endl;
   return 0;
}