#include<filesystem>
namespace fs = std::filesystem;
解决方法:
https://stackoverflow.com/questions/53201991/how-to-use-stdfilesystem-on-gcc-8
实际是需要在编译的时候加上
--std=c++17 -lstdc++fs
标签:std,fs,c++,编译,lstd,filesystem
From: https://www.cnblogs.com/simp/p/16925680.html