📅  最后修改于: 2022-03-11 14:44:45.362000             🧑  作者: Mango
The size() function is consistent with other STL containers
(like vector, map, etc.) and length() is consistent with most
peoples intuitive notion of character strings like a word, sentence
or paragraph. We say a paragraph'ss length not its size, so length()
is to make things more readable.