C ++ STL中const_iterator和非const迭代器之间有什么区别？ [英] What is the difference between const_iterator and non-const iterator in the C++ STL?

问题描述

const_iterator 和迭代器之间有什么区别？你在哪里使用其中一个？

What is the difference between a const_iterator and an iterator and where would you use one over the other?

推荐答案

const_iterator s不允许你更改它们的值指向常规迭代器 s。

const_iterators don't allow you to change the values that they point to, regular iterators do.

与C ++中的所有内容一样，总是更喜欢 const ，除非有充分的理由使用常规迭代器（即你想使用它们不是 const 的事实来改变指向 - 价值）。

As with all things in C++, always prefer const, unless there's a good reason to use regular iterators (i.e. you want to use the fact that they're not const to change the pointed-to value).

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