C++/List/list merge

Merge one list with another list

<source lang="cpp">

/* The following code example is taken from the book

* "The C++ Standard Library - A Tutorial and Reference"
* by Nicolai M. Josuttis, Addison-Wesley, 1999
*
* (C) Copyright Nicolai M. Josuttis 1999.
* Permission to copy, use, modify, sell and distribute this software
* is granted provided this copyright notice appears in all copies.
* This software is provided "as is" without express or implied
* warranty, and with no claim as to its suitability for any purpose.
*/

1. include <iostream>
2. include <list>
3. include <algorithm>
4. include <iterator>

using namespace std; void printLists (const list<int>& l1, const list<int>& l2) {

   cout << "list1: ";
   copy (l1.begin(), l1.end(), ostream_iterator<int>(cout," "));
   cout << endl << "list2: ";
   copy (l2.begin(), l2.end(), ostream_iterator<int>(cout," "));
   cout << endl << endl;

} int main() {

   // create two empty lists
   list<int> list1, list2;
   // fill both lists with elements
   for (int i=0; i<6; ++i) {
       list1.push_back(i);
       list2.push_front(i);
   }
   printLists(list1, list2);

   // merge both sorted lists into the first list
   list1.merge(list2);
   printLists(list1, list2);

} /* list1: 0 1 2 3 4 5 list2: 5 4 3 2 1 0 list1: 0 1 2 3 4 5 5 4 3 2 1 0 list2:

*/
       
 </source>