How to get current time

tsubasa · 04-30-2009, 08:26 PM

Hello, i'm trying to print the current time but i'm getting it like this " Thu Apr 30 07:09:51 2009 "
I only need the time, i don't need the date, year etc...

How do i do that??

This is what i used:

Code:

    
time_t t;
    struct tm *local;
    t = time(NULL);
    local = localtime(&t);
...........
       fprintf(file_out, "Arrival time: %s\n", asctime(local)   );
...........

Right now i'm only trying to print the current time but what i really need is to be able to work with that time. Like i need to first use it as arrival time then use it to calculate how much time it takes to complete a certain job then finally i will have to print both on screen.

That's why i only need the time and not the dates etc....
Can anybody help me?

BEN10 · 04-30-2009, 09:52 PM

this is what u can do determine the time interval between two events.

Code:

clock_t start,end;
start=clock();
//do something
end=clock();

(end-start)/CLOCKS_PER_SEC will give u the required time elapsed.

itCbitC · 04-30-2009, 10:04 PM

How about printing out just those elements of the struct tm object you're interested in instead of the whole thing. Just my 2c, but in this case it maybe better to take the difference of the begin and end times (epoch) instead of first converting them to a human-readable form and then taking their difference as the job may rollover to next day and those difference calculations will then be incorrect.

matsp · 05-01-2009, 02:03 AM

You can also use difftime() to take the difference between to time_t values.

--
Mats

04-30-2009, 08:26 PM	#1
tsubasa Registered User Join Date: May 2006 Posts: 19	How to get current time Hello, i'm trying to print the current time but i'm getting it like this " Thu Apr 30 07:09:51 2009 " I only need the time, i don't need the date, year etc... How do i do that?? This is what i used: Code: time_t t; struct tm *local; t = time(NULL); local = localtime(&t); ........... fprintf(file_out, "Arrival time: %s\n", asctime(local) ); ........... Right now i'm only trying to print the current time but what i really need is to be able to work with that time. Like i need to first use it as arrival time then use it to calculate how much time it takes to complete a certain job then finally i will have to print both on screen. That's why i only need the time and not the dates etc.... Can anybody help me?
tsubasa is offline

04-30-2009, 09:52 PM	#2
BEN10 DESTINY Join Date: Jul 2008 Location: in front of my computer Posts: 656	this is what u can do determine the time interval between two events. Code: clock_t start,end; start=clock(); //do something end=clock(); (end-start)/CLOCKS_PER_SEC will give u the required time elapsed. __________________ HOPE YOU UNDERSTAND....... for( ; ; ) printf("If you can't make it good, at least make it look good"); PC specifications- 512MB RAM, Windows XP sp3, 2.79 GHz pentium D. IDE- Microsoft Visual Studio 2008 Express Edition
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04-30-2009, 10:04 PM	#3
itCbitC Registered User Join Date: Oct 2008 Location: TX Posts: 1,262	How about printing out just those elements of the struct tm object you're interested in instead of the whole thing. Just my 2c, but in this case it maybe better to take the difference of the begin and end times (epoch) instead of first converting them to a human-readable form and then taking their difference as the job may rollover to next day and those difference calculations will then be incorrect.
itCbitC is offline

05-01-2009, 02:03 AM	#4
matsp Kernel hacker Join Date: Jul 2007 Location: Farncombe, Surrey, England Posts: 15,686	You can also use difftime() to take the difference between to time_t values. -- Mats __________________ Compilers can produce warnings - make the compiler programmers happy: Use them! Please don't PM me for help - and no, I don't do help over instant messengers.
matsp is offline

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