获取当前时间点(C)

static void Get_Now_Time(std::string &outname) { char buf[256]=""; struct tm* date_time; time_t now; time(&now); date_time = localtime(&now); strftime(buf, sizeof(buf)/sizeof(buf[0]), "%Y%m%d_%H%M%S", date_time); outname = std::string(buf); return; }