#include <iostream>     // cout
#include <algorithm>    // generate_n
using namespace std;
int current = 0;
int UniqueNumber () { return ++current; }

int main () {
  int myarray[9];

  generate_n (myarray, 5, UniqueNumber);

  cout << "myarray contains:";
  for (int i=0; i<9; ++i)
    cout << ' ' << myarray[i];
  cout << '\n';

  return 0;
}