C++/Deque/deque iterator
Define iterator for deque
// Demonstrating the generic find algorithm with a deque
#include <iostream>
#include <cassert>
#include <deque>
#include <algorithm> // For find
using namespace std;
int main()
{
int x[5] = {1, 2, 3, 4, 5};
deque<int> deque1(&x[0], &x[5]);
// Search for the first occurrence of the letter e:
deque<int>::iterator i;
cout.precision(10);
for (i = deque1.begin(); i != deque1.end(); ++i)
cout << *i << endl;
return 0;
}
/*
1
2
3
4
5
*/
Use iterator and reverse_iterator with deque
/* 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 <deque>
#include <algorithm>
using namespace std;
void print (int elem)
{
cout << elem << " ";
}
int main()
{
deque<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 2
deque<int>::iterator pos1;
pos1 = find (coll.begin(), coll.end(), // range
2); // value
// find position of element with value 7
deque<int>::iterator pos2;
pos2 = find (coll.begin(), coll.end(), // range
7); // value
// print all elements in range [pos1,pos2)
for_each (pos1, pos2, // range
print); // operation
cout << endl;
// convert iterators to reverse iterators
deque<int>::reverse_iterator rpos1(pos1);
deque<int>::reverse_iterator rpos2(pos2);
// print all elements in range [pos1,pos2) in reverse order
for_each (rpos2, rpos1, // range
print); // operation
cout << endl;
}
/*
2 3 4 5 6
6 5 4 3 2
*/