// copyio.cpp: Using the copy algorithm for I/O
#include <fstream>
#include <iostream>
#include <iterator>
#include <vector>
using namespace std;
typedef istream_iterator<int> istream_iter;

int main() {
 vector<int> a;
 ifstream file("example.txt");
 if (file.fail()) {
  cout << "Cannot open or read file example.txt.\n";
  return 1;
 }
 copy(istream_iter(file), istream_iter(), inserter(a, a.begin()));
 copy(a.begin(), a.end(), ostream_iterator<int>(cout, " "));
 cout << endl;
 return 0;
}