//
//  list.cpp -- how do I use a list?
//
#include <list>
#include <iostream>
using namespace std;

void main() {

  cout << "\n  Testing Basic List Operations "
       << "\n ===============================\n\n";

  list<double> li;

  cout << "  pushing back " << 0.5 << ", " << 0.75 
       << ", " << 1.00 << ", and " << 1.25 << "\n";

  li.push_back(0.50);          // push-back operation will silently
  li.push_back(0.75);          // allocate memory as needed to hold the
  li.push_back(1.00);          // push_back entries
  li.push_back(1.25);

  cout << "\n  the list length is " << li.size() << "\n"
       << "  it contains the elements ";

  list<double>::iterator it;
  for(it=li.begin(); it!=li.end(); it++)
    cout << *it << "  ";  // interatopm is only defined over the size
  cout << "\n\n";         // of the list after entries are made

  cout << "  changing the 2nd element to 2.00:\n";

  it = li.begin();
  ++it;
  *it = 2.00;

  cout << "  its elements are now ";
  for(it=li.begin(); it!=li.end(); it++)
    cout << *it << "  ";
  cout << "\n\n";

  cout << "  inserting " << 13.6 << " after the second element:\n";
  it = li.begin();
  ++it; ++it;
  li.insert(it,13.6);

  cout << "  its elements are now ";
  for(it=li.begin(); it!=li.end(); it++)
    cout << *it << "  ";
  cout << "\n\n";

//

  cout << "  inserting " << -7.2 << " at beginning:\n";
  it = li.begin();
  li.insert(it,-7.2);

  cout << "  its elements are now ";
  for(it=li.begin(); it!=li.end(); it++)
    cout << *it << "  ";
  cout << "\n\n";

  cout << "  inserting " << -22.2 << " after the last element:\n";
  it = li.end();
  li.insert(it,-22.2);

  cout << "  its elements are now ";
  for(it=li.begin(); it!=li.end(); it++)
    cout << *it << "  ";
  cout << "\n\n";


}