//----------------------------------------------------------------
//
// vector.cpp
//
// Code to illustrate the use of vectors.
//
// written by: Simon Parsons
// modified  : 5th June 2010
//
//----------------------------------------------------------------

#include <iostream>
#include <vector>        // Remember we need this to use vectors
using namespace std;

//----------------------------------------------------------------

int main() {

  // Here we declare a vector that has 10 elements.
  // and we use an index to set the values.

  vector<int> V(10);
  for ( int i=0; i<10; i++ ) {
    V[i] = i * 10;
  }

  // Now use an iterator to print the elements out.
  vector<int>::iterator p;
  for ( p = V.begin(); p != V.end(); p++ ) {
    cout << *p << " ";
  }
  cout << endl;

  // Add an element to the vector, and print it again.

  V.push_back(10);
  for ( p = V.begin(); p != V.end(); p++ ) {
    cout << *p << " ";
  }
  cout << endl;

  // Now remove the last two elements:
  V.pop_back();
  V.pop_back();
  for ( p = V.begin(); p != V.end(); p++ ) {
    cout << *p << " ";
  }
  cout << endl;

  // Now remove all the elements, one by one:

  while(!V.empty()){
    cout << "Size is " << V.size() << " ";
    cout << "First element is " << V.front() << " ";
    cout << "Last element is " << V.back() << endl;
    V.pop_back();
  }

  // Set up V as it was originally, but using puSh_back

  for ( int i=0; i<10; i++ ) {
    V.push_back(i * 10);
  }

  for ( p = V.begin(); p != V.end(); p++ ) {
    cout << *p << " ";
  }
  cout << endl;

  // create a vector W that holds 10 copies of the integer 20:

  vector<int> W(10, 20);
  for ( p = W.begin(); p != W.end(); p++ ) {
    cout << *p << " ";
  }
  cout << endl;

  // create a vector X that is a copy of V:

  vector<int> X(V.begin(), V.end());
  for ( p = X.begin(); p != X.end(); p++ ) {
    cout << *p << " ";
  }
  cout << endl;
}