c获取时间

影者东升

1. 获取时间戳gettimeofday(struct  timeval*tv,struct  timezone *tz)
2. time(time_t *t)获取日期

#include <stdio.h>
#include <sys/time.h>
#include <unistd.h>
#include <time.h>
int main() {
  // timestamp
  struct timeval timeval;
  gettimeofday(&timeval, NULL);
  printf("millsec:%d\n", timeval.tv_sec * 1000 + timeval.tv_usec / 1000);
  sleep(1);
  gettimeofday(&timeval, NULL);
  printf("millsec:%d\n", timeval.tv_sec * 1000 + timeval.tv_usec / 1000);
  // date
  time_t  seconds;
  struct tm *date;
  time(&seconds);
  date = gmtime(&seconds);
  printf("sec:%d\n", date->tm_sec);
  printf("min:%d\n", date->tm_min);
  printf("hour:%d\n", date->tm_hour);
  printf("day:%d\n", date->tm_mday);
  printf("month:%d\n", date->tm_mon);
  printf("year:%d\n", date->tm_year + 1900);
  return 0;
}