C++如何创建文件夹

我的当前代码

#include<windows.h>
#include<fstream>
#include<direct.h>
#include<conio.h>
#include<sys/stat.h>
#include<filesystem>

int main(){
    int choice;
    std::string folder_n;

    std::cin >> choice;

    if(choice == 2){
        std::cout << "Enter folder name" << std::endl;
        std::cin >> folder_n;

        filesystem::create_directory(folder_n);
        std::cout << "created folder named " << folder_n << std::endl ;
            
    }

    return 0;
}

我的问题--> 错误:“文件系统”尚未声明 有人能告诉我为什么会出现这个错误,以及如何修复它吗

Note : 1. filesystem is included in my c++ version because intellisense is showing filesystem
       2. I am using MinGw 
       3. My MinGW version is 9.2.0```