C++ STL 中的 const_iterator 和非 const 迭代器有什么区别?

2022-01-10 00:00:00 iterator constants c++ stl

const_iterator 和 iterator 之间有什么区别，你会在哪里使用一个而不是另一个?

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_iterators 不允许你更改它们指向的值，常规 iterators做.

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

与 C++ 中的所有东西一样，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 更改指向的值).

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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