Linux下系统时间函数--->gettimeofday

1.时间精确到微妙

#include <stdio.h>

#include <time.h>

#include <sys/time.h>

 

int main(int argc,char**argv)

{

struct tm *lt;

struct timeval *tv;

gettimeofday(tv,NULL);

lt=localtime(&(tv->tv_sec));

printf("Beijing Time:%04d-%02d-%02d %02d:%02d:%02d %.3lfms\n",lt->tm_year,lt->tm_mon,lt->tm_mday,lt->tm_hour,lt->tm_min,lt->tm_sec,(double)(tv->tv_usec)/1000);

return 0;

}