C语言 - 获取系统时间 以年月日时分秒的形式输出

时间:2024-07-01 11:05:20

ESP32需要给下位机通过UART发送时间戳,形式是年月日时分秒的十六进制数据包。

#include <stdio.h>

#include <time.h>

int main()
{
  time_t rawtime;
  struct tm * timeinfo;
  time ( &rawtime );
  timeinfo = localtime ( &rawtime );
  int year,month,day,hour,min,sec;
  year = +timeinfo->tm_year;
  month = +timeinfo->tm_mon;
  day = timeinfo->tm_mday;
  hour = timeinfo->tm_hour;
  min = timeinfo->tm_min;
  sec = timeinfo->tm_sec;
  printf ( "当前时间:%4d-%02d-%02d %02d:%02d:%02d\n\n",year, month,day,hour,min,sec);
  printf ( "你需要的格式:%4d%02d%02d%02d%02d%02d\n\n",year, month,day,hour,min,sec);   char hyy[],lyy[],MM[],dd[],hh[],mm[],ss[];
  sprintf(hyy,"%02X",year/);
  sprintf(lyy,"%02X",year%);
  sprintf(MM,"%02X",month);
  sprintf(dd,"%02X",day);
  sprintf(hh,"%02X",hour);
  sprintf(mm,"%02X",min);
  sprintf(ss,"%02X",sec);   printf("转化为16进制:%02s%02s%02s%02s%02s%02s%02s\n",hyy,lyy,MM,dd,hh,mm,ss);
  //exit(0);
  return ;
}