// Demonstrating use of for_each and reverse algorithms with list


#include <list.h>
#include <algo.h>
#include <assert.h>

void show_int (int x)
{
  cout << x << " ";
}

void show_int_square (int x)
{
  cout << x*x << " ";
}

int main()
{
  cout << "Demonstrating use of for_each algorithm:" << endl;

  list<int> list2;

  // populating the list using "push_back"
  list2.push_back(39);
  list2.push_back(99);
  list2.push_back(79);
  list2.push_back(69);
  list2.push_back(59);
  list2.push_back(89);
  list2.push_back(89);
  list2.push_back(49);

  // long way to list the squares of each number in list2
  // this one uses iterators...
  cout << "LONG WAY FOR SQUARES: " << endl;
  list<int>::iterator ip;
  for (ip=list2.begin(); ip!=list2.end(); ip++)
    cout << (*ip) * (*ip) << " " ;
  cout << endl;

  // easy way is to use "for_each" algorithm with a function
  cout << "SHORT WAY FOR SQUARES: " << endl;
  for_each(list2.begin(), list2.end(), show_int_square);
  cout << endl;

  // show the base list
  cout << "BEFORE REVERSE: " << endl;
  for_each(list2.begin(), list2.end(), show_int);
  cout << endl;

  // reverse the list by using "reverse" algorithm
  reverse(list2.begin(), list2.end());
  cout << "AFTER REVERSE: " << endl;
  for_each(list2.begin(), list2.end(), show_int);
  cout << endl;

}