1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
.. Copyright David Abrahams 2006. Distributed under the Boost
.. Software License, Version 1.0. (See accompanying
.. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Example
.......
The following example prints an array of characters in reverse order
using ``reverse_iterator``.
::
char letters_[] = "hello world!";
const int N = sizeof(letters_)/sizeof(char) - 1;
typedef char* base_iterator;
base_iterator letters(letters_);
std::cout << "original sequence of letters:\t\t\t" << letters_ << std::endl;
boost::reverse_iterator<base_iterator>
reverse_letters_first(letters + N),
reverse_letters_last(letters);
std::cout << "sequence in reverse order:\t\t\t";
std::copy(reverse_letters_first, reverse_letters_last,
std::ostream_iterator<char>(std::cout));
std::cout << std::endl;
std::cout << "sequence in double-reversed (normal) order:\t";
std::copy(boost::make_reverse_iterator(reverse_letters_last),
boost::make_reverse_iterator(reverse_letters_first),
std::ostream_iterator<char>(std::cout));
std::cout << std::endl;
The output is::
original sequence of letters: hello world!
sequence in reverse order: !dlrow olleh
sequence in double-reversed (normal) order: hello world!
The source code for this example can be found `here`__.
__ ../example/reverse_iterator_example.cpp
|
