有< algorithm> 中的标题库中的w / cpp / algorithm / sort>排序算法。它排在现场，所以如果你做以下，你的原始单词将排序。

There is a sorting algorithm in the standard library, in the header <algorithm>. It sorts inplace, so if you do the following, your original word will become sorted.

std::sort(word.begin(), word.end());

如果您不想丢失原件，请先复制。

If you don't want to lose the original, make a copy first.

std::string sortedWord = word;
std::sort(sortedWord.begin(), sortedWord.end());