#include <iostream.h>
#include <stl.h>

void print (vector<double>& vector_)
{
  for (int i = 0; i < vector_.size (); i++)
    cout << vector_[i] << " ";
  cout << endl;
}

int main ()
{
  vector<double> v1; // Empty vector of doubles.
  v1.push_back (32.1);
  v1.push_back (40.5);
  vector<double> v2; // Another empty vector of doubles.
  v2.push_back (3.56);
  cout << "v1 = ";
  print (v1);
  cout << "v2 = ";
  print (v2);
  v1.swap (v2); // Swap the vector's contents.
  cout << "v1 = ";
  print (v1);
  cout << "v2 = ";
  print (v2);
  v2 = v1; // Assign one vector to another.
  cout << "v2 = ";
  print (v2);
  return 0;
}