e6ccf0ce
 Hu Chunming
提交三方库
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/* example for using class array<>
* (C) Copyright Nicolai M. Josuttis 2001.
* 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)
*/
#include <string>
#include <iostream>
#include <boost/array.hpp>
template <class T>
void print_elements (const T& x);
int main()
{
// create array of four seasons
boost::array<std::string,4> seasons = {
{ "spring", "summer", "autumn", "winter" }
};
// copy and change order
boost::array<std::string,4> seasons_orig = seasons;
for (std::size_t i=seasons.size()-1; i>0; --i) {
std::swap(seasons.at(i),seasons.at((i+1)%seasons.size()));
}
std::cout << "one way: ";
print_elements(seasons);
// try swap()
std::cout << "other way: ";
std::swap(seasons,seasons_orig);
print_elements(seasons);
// try reverse iterators
std::cout << "reverse: ";
for (boost::array<std::string,4>::reverse_iterator pos
=seasons.rbegin(); pos<seasons.rend(); ++pos) {
std::cout << " " << *pos;
}
// try constant reverse iterators
std::cout << "reverse: ";
for (boost::array<std::string,4>::const_reverse_iterator pos
=seasons.crbegin(); pos<seasons.crend(); ++pos) {
std::cout << " " << *pos;
}
std::cout << std::endl;
return 0; // makes Visual-C++ compiler happy
}
template <class T>
void print_elements (const T& x)
{
for (unsigned i=0; i<x.size(); ++i) {
std::cout << " " << x[i];
}
std::cout << std::endl;
}
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