// Oldham, Jeffrey D.
// 2000 Jan 29
// CS1321
#include <iostream.h>
#include <stdlib.h>		// has EXIT_SUCCESS
#include <vector>		// has vector
#include <string>		// has string

int main()
{
  std::vector<int> v;		// creates an empty vector that can
				// hold int's
  std::vector<string> w(4);	// creates a vector that can hold up
				// to four strings.  We can also
				// enlarge or shrink it as needed.
  cout << "Is the empty vector empty? ";
  if (v.empty())		// v.empty() returns a bool
    cout << "yes.\n";
  else
    cout << "no.\n";
  cout << "Is the vector of size 4 empty? ";
  if (w.size() == 0)		// w.size() returns number of position 
				// in w.  Note these positions need
				// not be filled with elements.
    cout << "yes.\n";
  else
    cout << "no.\n";

  w[0] = "hello";		// store a string at vector's first position
  v.push_back(7);		// grow vector one larger, placing 7 
				// in the new position
  v.push_back(13);		// add another element
  cout << "This should be 13: " << v[1] << endl;
  v.pop_back();			// shrink the vector by one position
  cout << "w[0] = " << w[0] << ".\n";

  return EXIT_SUCCESS;
}