参考：https://en.cppreference.com/w/cpp/io/c/remove

删除文件

• remove C++17 - removes a file or empty directory
• remove_all C++17 - removes a file or directory and all its contents, recursively
• rename - renames a file

#include <cstdio>

std::remove("file1.txt");

创建目录

来源：https://stackoverflow.com/questions/50960492/creating-folders-in-c

c++17

#include <filesystem>
namespace fs = std::filesystem;
fs::create_directories("./a/b/c")