std::string length() 和 size() 成员函数

std::string length() and size() member functions(std::string length() 和 size() 成员函数)

问题描述

我正在阅读这个问题的答案，发现实际上有一个方法叫做length() 用于 std::string(我一直使用 size()).在 std::string 类中使用此方法是否有任何特定原因?我阅读了 MSDN 和 CppRefernce，它们似乎表明 size() 和 length() 之间没有区别.如果是这样，是不是让课程的用户更加困惑?

I was reading the answers for this question and found that there is actually a method called length() for std::string (I always used size()). Is there any specific reason for having this method in std::string class? I read both MSDN and CppRefernce, and they seem to indicate that there is no difference between size() and length(). If that is so, isn't it making more confusing for the user of the class?

推荐答案

根据 文档，这些只是同义词.size() 是否与其他 STL 容器(如vector、map、等)保持一致，并且length() 是要符合大多数人对字符串的直观概念.人们通常谈论一个单词、句子或段落的长度，而不是它的大小，所以 length() 是为了让事情更具可读性.

As per the documentation, these are just synonyms. size() is there to be consistent with other STL containers (like vector, map, etc.) and length() is to be consistent with most peoples' intuitive notion of character strings. People usually talk about a word, sentence or paragraph's length, not its size, so length() is there to make things more readable.

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