Mega Code Archive
Use reverse_iterator and iterator with list
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/* 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.
*/
#include <iostream>
#include <list>
#include <algorithm>
using namespace std;
int main()
{
list<int> coll;
// insert elements from 1 to 9
for (int i=1; i<=9; ++i) {
coll.push_back(i);
}
// find position of element with value 5
list<int>::iterator pos;
pos = find (coll.begin(), coll.end(), // range
5); // value
// print value of the element
cout << "pos: " << *pos << endl;
// convert iterator to reverse iterator
list<int>::reverse_iterator rpos(pos);
// print value of the element to which the reverse iterator refers
cout << "rpos: " << *rpos << endl;
// convert reverse iterator back to normal iterator
list<int>::iterator rrpos;
rrpos = rpos.base();
// print value of the element to which the normal iterator refers
cout << "rrpos: " << *rrpos << endl;
}
/*
pos: 5
rpos: 4
rrpos: 5
*/
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