1 | /* example for using class array<> |
2 | * (C) Copyright Nicolai M. Josuttis 2001. |
3 | * Distributed under the Boost Software License, Version 1.0. (See |
4 | * accompanying file LICENSE_1_0.txt or copy at |
5 | * http://www.boost.org/LICENSE_1_0.txt) |
6 | */ |
7 | |
8 | #include <string> |
9 | #include <iostream> |
10 | #include <boost/array.hpp> |
11 | |
12 | template <class T> |
13 | void print_elements (const T& x); |
14 | |
15 | int main() |
16 | { |
17 | // create array of four seasons |
18 | boost::array<std::string,4> seasons = { |
19 | .elems: { "spring" , "summer" , "autumn" , "winter" } |
20 | }; |
21 | |
22 | // copy and change order |
23 | boost::array<std::string,4> seasons_orig = seasons; |
24 | for (std::size_t i=seasons.size()-1; i>0; --i) { |
25 | std::swap(lhs&: seasons.at(i),rhs&: seasons.at(i: (i+1)%seasons.size())); |
26 | } |
27 | |
28 | std::cout << "one way: " ; |
29 | print_elements(x: seasons); |
30 | |
31 | // try swap() |
32 | std::cout << "other way: " ; |
33 | std::swap(a&: seasons,b&: seasons_orig); |
34 | print_elements(x: seasons); |
35 | |
36 | // try reverse iterators |
37 | std::cout << "reverse: " ; |
38 | for (boost::array<std::string,4>::reverse_iterator pos |
39 | =seasons.rbegin(); pos<seasons.rend(); ++pos) { |
40 | std::cout << " " << *pos; |
41 | } |
42 | |
43 | // try constant reverse iterators |
44 | std::cout << "reverse: " ; |
45 | for (boost::array<std::string,4>::const_reverse_iterator pos |
46 | =seasons.crbegin(); pos<seasons.crend(); ++pos) { |
47 | std::cout << " " << *pos; |
48 | } |
49 | std::cout << std::endl; |
50 | |
51 | return 0; // makes Visual-C++ compiler happy |
52 | } |
53 | |
54 | template <class T> |
55 | void print_elements (const T& x) |
56 | { |
57 | for (unsigned i=0; i<x.size(); ++i) { |
58 | std::cout << " " << x[i]; |
59 | } |
60 | std::cout << std::endl; |
61 | } |
62 | |
63 | |