Linux time zone details and common time functions time and time zone The entire earth is divided into 24 time zones, each time zone has its own local time. ø UTC Time and GMT time We can think of Greenwich Mean Time (GMT = UTC), GMT and
Linux/unix-time timestamp processing conversion functionThe time function under LinuxWe can often use time in programming, such as getting the system time (to get the system's year, month, day, hour, minute, second, week, etc.), or to do something
01. Time () provides second-level precision02.03.1 header file 04.2 function prototype05. time_t time (time_t * timer)06. The function returns the number of seconds from TC1970-1-1 0: 0 to the present07.08. Use the time () function combined with
First, the Linux common time correlation function-asctime,ctime,getttimeofday,gmtime,localtime,mktime,settimeofday,timeAsctime: Converting dates to stringsCTime: Converts a number of seconds into a stringGettimeofday: Gets the time and date based on
Time () provides a second level of accuracy
1. header File
2. Function prototype
time_t Time (time_t * timer)
The function returns the number of seconds starting from Tc1970-1-1 0:0:0 to now
Use the time () function with other
Http://net.pku.edu.cn/~yhf/linux_c/function/04.html
Asctime (the time and date are represented in string format)
Related functions
Time,ctime,gmtime,localtime
Table header File
precise timing in microseconds
Long Long l1,l2,l3;
Timeval TV1;
Take a Time
Gettimeofday (&tv,null);
L1 = tv.tv_sec*1000*1000 + tv.tv_usec;
Execute some code, such as algorithm 1 ...
Second time taken
Gettimeofday (&tv,null);
L2 = tv.tv_sec*1000*1
//-------------------------------------------------------------//
Asctime (representing time and date in string format)
#include
Defining functions
char * asctime (const struct TM * timeptr);Function description
asctime () converts the
CSDP Examination Syllabus
1. download the application form for certification. * Read all the details before entering the information. * The application must be easily read, and the application with hard-to-recognize handwriting will be rejected. *
Type description of the timeTimeTimeTime :日历时间。1970年1月1日0点到此时的秒数。Time acquisition functiontime_t time (time_t *t);Function Description: This function returns the number of seconds that have elapsed since January 1, 1970 00:00 00 seconds. If time_t
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.