63 lines
1.6 KiB
C++
63 lines
1.6 KiB
C++
/* example for using class array<>
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* (C) Copyright Nicolai M. Josuttis 2001.
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* Distributed under the Boost Software License, Version 1.0. (See
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* accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*/
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#include <string>
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#include <iostream>
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#include <boost/array.hpp>
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template <class T>
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void print_elements (const T& x);
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int main()
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{
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// create array of four seasons
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boost::array<std::string,4> seasons = {
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{ "spring", "summer", "autumn", "winter" }
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};
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// copy and change order
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boost::array<std::string,4> seasons_orig = seasons;
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for (std::size_t i=seasons.size()-1; i>0; --i) {
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std::swap(seasons.at(i),seasons.at((i+1)%seasons.size()));
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}
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std::cout << "one way: ";
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print_elements(seasons);
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// try swap()
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std::cout << "other way: ";
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std::swap(seasons,seasons_orig);
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print_elements(seasons);
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// try reverse iterators
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std::cout << "reverse: ";
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for (boost::array<std::string,4>::reverse_iterator pos
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=seasons.rbegin(); pos<seasons.rend(); ++pos) {
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std::cout << " " << *pos;
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}
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// try constant reverse iterators
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std::cout << "reverse: ";
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for (boost::array<std::string,4>::const_reverse_iterator pos
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=seasons.crbegin(); pos<seasons.crend(); ++pos) {
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std::cout << " " << *pos;
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}
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std::cout << std::endl;
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return 0; // makes Visual-C++ compiler happy
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}
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template <class T>
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void print_elements (const T& x)
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{
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for (unsigned i=0; i<x.size(); ++i) {
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std::cout << " " << x[i];
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}
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std::cout << std::endl;
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}
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