C++ STL（24）：Stream Iterator，reverse_iterator，raw_storage_iterator（迭代器）

#include <iostream>
#include <iterator>
#include <list>
#include <vector>
#include <functional>
#include <algorithm>
#include <memory>//for raw_storage_iterator

//Iterator Classes迭代器类：Stream Iterator，reverse_iterator，raw_storage_iterator
int main()
{
	/************************************************************************/
	//istream_iterator和ostream_iterator
	/************************************************************************/
	std::vector<int> V;
	std::copy(std::istream_iterator<int>(std::cin), std::istream_iterator<int>(), std::back_inserter(V));
	using Iterator = std::vector<int>::iterator;
	for (Iterator it = V.begin(); it != V.end(); ++it)
	{
		std::cout << *it << " ";
	}
	std::cout << std::endl;

	std::copy(V.begin(), V.end(), std::ostream_iterator<int>(std::cout, " "));
	std::cout << std::endl;

	/************************************************************************/
	//template <class RandomIterator> class reverse_iterator
	/************************************************************************/
	const int N = 10;
	int A[N] = { 2, 5, 7, 8, 1, 5, 3, 6, 9, 1 };
	std::list<int> li(std::begin(A), std::end(A));
	//正向打印输出
	//2 5 7 8 1 5 3 6 9 1
	std::copy(li.begin(), li.end(), std::ostream_iterator<int>(std::cout, " "));
	std::cout << std::endl;

	//反向打印输出(1)：以rbegin()和rend()
	//1 9 6 3 5 1 8 7 5 2
	std::copy(li.rbegin(), li.rend(), std::ostream_iterator<int>(std::cout, " "));
	std::cout << std::endl;

	//反向打印输出(2)：以reverse_iterator
	//1 9 6 3 5 1 8 7 5 2
	using reverseIterator = std::reverse_iterator<std::list<int>::iterator>;
	std::copy(reverseIterator(li.end()), reverseIterator(li.begin()), std::ostream_iterator<int>(std::cout, " "));
	std::cout << std::endl;

	/************************************************************************/
	//template <class OutputIterator, class Type> class raw_storage_iterator
	/************************************************************************/
	//class raw_storage_iterator:将元素存储到一个未初始化的内存中
	int* A2 = new int[N];
	std::transform(std::begin(A), std::end(A), std::raw_storage_iterator<int*, int>(A2), std::negate<int>());
	//-2 -5 -7 -8 -1 -5 -3 -6 -9 -1
	std::copy(A2, A2 + N, std::ostream_iterator<int>(std::cout, " "));
	std::cout << std::endl;

	return 0;
}

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