std::filesystem:: last_write_time

#include <chrono>
#include <filesystem>
#include <format>
#include <fstream>
#include <iostream>
using namespace std::chrono_literals;
int main()
{
    auto p = std::filesystem::temp_directory_path() / "example.bin";
    std::ofstream{p.c_str()}.put('a'); // 创建文件
    std::filesystem::file_time_type ftime = std::filesystem::last_write_time(p);
    std::cout << std::format("File write time is {}\n", ftime);
    // 将文件写入时间向后移动1小时
    std::filesystem::last_write_time(p, ftime + 1h);
    // 从文件系统重新读取
    ftime = std::filesystem::last_write_time(p);
    std::cout << std::format("File write time is {}\n", ftime);
    std::filesystem::remove(p);
}