#include <iostream>

#include <vector>

#include <algorithm>

using namespace std;

​

void add_one(int &value) {

  value++;

}

​

int main() {

  vector<int> numbers = {1, 7, 3, 5, 9, 2};

​

  // Increase each number by one

  for_each(numbers.begin(), numbers.end(), add_one);

​

  // Output the modified numbers

  for (int number : numbers) {

    cout << number << " ";

  }

​

  return 0;

}

​