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问题描述
C++ STL 中有多少种迭代器?到目前为止，我知道这些:
How many types of iterators are there in C++ STL? As of now, I know of these:
- 输出迭代器
- 输入迭代器
- 前向迭代器
- 随机访问迭代器
还有更多吗?它们之间有什么区别?各自的局限和特点是什么?什么时候用什么类型?
Are there more? What are the differences between them? What are the limitations and characteristics of each? Which type is used when?
推荐答案
如果可以，请查找并阅读C++ 标准库:教程和参考".本书包含一整章关于 STL 迭代器的内容.
If you can, find and read "The C++ Standard Library: A Tutorial and Reference". This book contains a whole chapter about STL iterators.
这是书中的一些内容:
Iterator Category Ability Providers
----------------- ------------------------------- ----------------------------
Input iterator Reads forward istream
Output iterator Writes forward ostream, inserter
Forward iterator Reads/writes forward forward_list,
unordered_[multi]set,
unordered_[multi]map
Bidirectional it. Reads/writes forward/backward list, [multi]set, [multi]map
Random access it. Reads/writes with random access vector, deque string, array
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