array3.cpp

`/* クラス array<> の使用例
*/
#include <string>
#include <iostream>
#include <boost/array.hpp>
template <class T>
void print_elements (const T& x);
int main()
{
// 四季の array を作る
boost::array<std::string,4> seasons = {
{ "spring", "summer", "autumn", "winter" }
};
// コピーして、並び順を変える
boost::array<std::string,4> seasons_orig = seasons;
for (unsigned i=seasons.size()-1; i>0; --i) {
swap(seasons.at(i),seasons.at((i+1)%seasons.size()));
}
std::cout << "one way: ";
print_elements(seasons);
// swap() を試す
std::cout << "other way: ";
swap(seasons,seasons_orig);
print_elements(seasons);
// 逆イテレータを使ってみる
std::cout << "reverse: ";
for (boost::array<std::string,4>::reverse_iterator pos
=seasons.rbegin(); pos<seasons.rend(); ++pos) {
std::cout << " " << *pos;
}
std::cout << std::endl;
return 0; // Visual-C++ コンパイラのご機嫌をとる
}
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;
}
`