Gets the system time that is accurate to microseconds

C

1. Introduction: In C language can use function gettimeofday () function to get time, its precision can achieve subtle. 2. Function prototype: #include <sys/time.h> int gettimeofday (struct timeval*tv,struct timezone *tz) 3. Description: Gettimeofday () will present Time is returned with the TV structure, and the local time zone's information is placed in the structure referred to in TZ 4. Structure: 1>timeval struct timeval{long tv_sec;/* sec/long tv_usec;/* Micro The 2>timezone structure is defined as: struct timezone{int tz_minuteswest;/* and Greenwich TIME difference how many minutes/int tz_dsttime; /*type of DST correction*/} 3> the TV or TZ can be empty in the Gettimeofday () function.

If empty, it does not return its corresponding struct body.

The 4> function returns 0 after successful execution, and returns 1 after failure, and the error code is stored in errno.                                                                                              
5. Procedure example: * #include <time.h>  
  #include <sys/time.h> #include <stdio.h> void main (void) {struct Timeval TV; 
  struct timezone tz;    
  struct TM *p;  

  Gettimeofday (&AMP;TV, &tz);  
  p = localtime (&tv.tv_sec); printf ("The precise microseconds time:%d-%d-%d-%d-%d-%d.%ld\n", 1900+p->tm_year, 1+p->tm_mon, P-> Tm_mday, P->tm_hour, P->tm_min, P->tm_sec, tv.tv_usec); } 6.

struct the TM structure defined by TM in time.h to obtain the date and time. struct TM {int Tm_sec/* sec-The value interval is [0,59]/int tm_min;//* The value interval is [0,59]/int tm_hour; * Time-value interval is [0,23 ] */int tm_mday; * * One months date-value range is [1,31]/int tm_mon; /* Month (starting from January, 0 represents January)-the value range is [0,11]/int tm_year; /* Year with the value equal to the actual year minus 1900/int tm_wday; * Week – The value range is [0,6], where 0 represents Sunday, 1 represents Monday, and so on/int tm_yday; /* The number of days from January 1 of each year – the value interval is [0,365], of which 0 represents January 1, 1 is January 2, and so on/int tm_isdst; /* Daylight Saving time identifier, TM_ISDST is positive when implementing daylight savings. When daylight saving time is not implemented, the TM_ISDST is 0 and TM_ISDST () is negative when the situation is not known. */} 7.
 LocalTime () Gets the time and date of the local time zone according to the given number of seconds subtracted from January 1, 1970

python

From  datetime  Import  *   
import  time  

dt = DateTime.Now ()
print dt.strftime ('%y-%m-%d-% H-%m-%s.%f ')