strftime

qi

std::string time_now() {
  time_t t = time(0);
  char tmp[64];
  strftime(tmp, sizeof(time), "%Y%m%dT%H%M%S", localtime(&t));
  return tmp;
}

　　

re

1. 

http://www.cplusplus.com/reference/ctime/strftime/

2. 

http://man7.org/linux/man-pages/man3/strftime.3.html

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