std::map<int,std::string,std::less> map; //升序
std::map<int,std::string,std::greater> map; //降序
参考:https://blog.csdn.net/sandalphon4869/article/details/105419706
https://blog.csdn.net/web17886480312/article/details/123614757
std::map<int,std::string,std::less> map; //升序
std::map<int,std::string,std::greater> map; //降序
参考:https://blog.csdn.net/sandalphon4869/article/details/105419706
https://blog.csdn.net/web17886480312/article/details/123614757