c++获取系统当前时间

版权声明：拒绝无脑抄袭，Ctrl+C可以，先看明白 https://blog.csdn.net/weixin_43627118/article/details/90515471

   void gettime()
    {
        time_t rawtime;
        struct tm *ptminfo;
        time(&rawtime);
        ptminfo = localtime(&rawtime);
        printf("current: %02d-%02d-%02d %02d:%02d:%02d\n",
        ptminfo->tm_year + 1900, ptminfo->tm_mon + 1, ptminfo->tm_mday,
        ptminfo->tm_hour, ptminfo->tm_min, ptminfo->tm_sec);
    }

比较常用，保存一下。