sort random number in C++

#include <algorithm>
#include <iomanip>
#include <iostream>
#include <random>
#include <vector>
using namespace std;
int main() {
  const int DATA_NO = 100;
  vector<int> v;
  random_device rdev;
  mt19937 gen(rdev());
  uniform_int_distribution<> dist(0, 999);
  for (int i = 0; i < DATA_NO; i++)
    v.push_back(dist(gen));
  for (int i = 0; i < DATA_NO; i++) {
    if (i % 10 == 0) cout << endl;
    cout << setw(4) << v[i];
  }
  cout << endl;
  sort(v.begin(), v.end());
  for (int i = 0; i < DATA_NO; i++) {
    if (i % 10 == 0) cout << endl;
    cout << setw(4) << v[i];
  }
  cout << endl;
}