// Code derived from Stroustrup's PPP2 book
// § 8.5.4 Pass-by-const-reference
//  -and beginning on p 276

#include <iostream>
#include <vector>

using namespace std;

void print(vector<double> v)  // pass-by-value; appropriate?
{
  cout << "{ ";

  for (int i = 0; i < (int)v.size(); ++i) {
    cout << v[i];

    if (i != (int)v.size() - 1)
      cout << ", ";
  }

  cout << " }\n";
}

void f(int x)
{
  vector<double> vd1(10);     // small vector
  vector<double> vd2(10000);  // large vector
  vector<double> vd3(x);      // vector of some unknown size

  // ... fill vd1, vd2, vd3 with values ...

  print(vd1);
  print(vd2);
  print(vd3);
}

int main() { f(10); }