能说说这么做的目的吗?

#include <windows.h> #include <iostream> #include <cstdio> int main(int argc, char* argv[]) { // 检查参数数量 if (argc != 3) { std::cerr << "用法: " << argv[0] << " <文件名> \"<YYYY-MM-DD HH:MM:SS>\"" << std::endl; return 1; } // 解析时间参数 SYSTEMTIME st = {0}; int year, month, day, hour, minute, second; if (sscanf(argv[2], "%d-%d-%d %d:%d:%d", &year, &month, &day, &hour, &minute, &second) != 6) { std::cerr << "时间格式错误,请使用: YYYY-MM-DD HH:MM:SS" << std::endl; return 1; } // 填充SYSTEMTIME结构 st.wYear = year; st.wMonth = month; st.wDay = day; st.wHour = hour; st.wMinute = minute; st.wSecond = second; st.wMilliseconds = 0; // 毫秒设为0 // 打开文件 HANDLE hFile = CreateFile( argv[1], // 文件名来自参数 GENERIC_WRITE, FILE_SHARE_WRITE, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL ); if (hFile == INVALID_HANDLE_VALUE) { std::cerr << "无法打开文件: " << GetLastError() << std::endl; return 1; } // 转换时间格式 FILETIME ftCreation, ftLastAccess, ftLastWrite; if (!SystemTimeToFileTime(&st, &ftCreation) || !SystemTimeToFileTime(&st, &ftLastAccess) || !SystemTimeToFileTime(&st, &ftLastWrite)) { std::cerr << "时间转换失败: " << GetLastError() << std::endl; CloseHandle(hFile); return 1; } // 设置文件时间 if (!SetFileTime(hFile, &ftCreation, &ftLastAccess, &ftLastWrite)) { std::cerr << "无法设置文件时间: " << GetLastError() << std::endl; CloseHandle(hFile); return 1; } CloseHandle(hFile); std::cout << "文件时间设置成功。" << std::endl; return 0; }