Programming Forums > Application Development > C

Navid · Jun 28th, 2005, 10:11 PM

How can I get the current date with C? Like the year,month,day,hour,minute and second.

EverLearning · Jun 28th, 2005, 10:20 PM

Quote:

Originally Posted by navnav

How can I get the current date with C? Like the year,month,day,hour,minute and second.

maybe smth like this?

system("date");

on gcc.

DaWei · Jun 28th, 2005, 10:23 PM

Refer to your documentation regarding "time", "asctime", "mktime". You'll encounter additional references along the way. Essentially, you'll start with the number of seconds elapsed since the epoch (January 1, 1970) and feed that to other functions to fill in a structure containing the things you want. The precise functions may turn out to be wrappers for newer functions using 64-bit rather than 32-bit values. Mileage varies, but it's all there for the picking.

Navid · Jun 28th, 2005, 10:30 PM

But i need to get those values without prompting, like call a function and return the year value(2005) to a variable.

Like in JavaScript I would write:

(Toggle Plain Text)

<script language="javascript">
year = new Date().getFullYear();
</script>

Navid · Jun 28th, 2005, 10:42 PM

hmm...
I'll just request it to be inputed from the user for now. But thanks i didnt know about those dos commands.

EverLearning · Jun 28th, 2005, 10:46 PM

Here's something else I found:
clicky
Then scroll down to the time.h and look at the example program, seems like it has what you you are looking for, which is basically same as what DaWei said.
Only this is a ready-made code

ps: I couldn't read the descriptions of the time functions, Mozilla times me out

but example compiled and worked.

nindoja · Jun 28th, 2005, 11:30 PM

This works on windows systems:

(Toggle Plain Text)

char dateStr[9];
_strdate(dateStr);

DaWei · Jun 29th, 2005, 7:59 AM

Quote:

But i need to get those values without prompting, like call a function and return the year value(2005) to a variable.

So what do you suppose those functions I referred you to, do in various ways? Churn butter? You need to evaluate your responses and follow up on them. It's part of learning to do the job. Sometimes your respondents will actually write the code for you, sometimes not.

nnxion · Jun 29th, 2005, 8:25 AM

Like post #3 said, fill the tmtime structure and get your information from there.

Nuticulus · Jun 29th, 2005, 8:41 AM

Like posts above, I recommend you use time.h. It's full of functions for getting the time. Here's a reference. Nice and simple.

If you need microseconds, you can use gettimeofday() under *nix. Read the manual pages for how to use it. I can't remember how to get the time in milliseconds under Windows right now. It may come back to me later.

Jun 28th, 2005, 10:11 PM	#1
Navid Hobbyist Programmer Join Date: Feb 2005 Location: Canada Posts: 187 Rep Power: 4	Getting the Date How can I get the current date with C? Like the year,month,day,hour,minute and second.

Jun 28th, 2005, 10:30 PM	#4
Navid Hobbyist Programmer Join Date: Feb 2005 Location: Canada Posts: 187 Rep Power: 4	But i need to get those values without prompting, like call a function and return the year value(2005) to a variable. Like in JavaScript I would write: (Toggle Plain Text) <script language="javascript"> year = new Date().getFullYear(); </script> <script language="javascript"> year = new Date().getFullYear(); </script>

Jun 28th, 2005, 10:46 PM	#6
EverLearning Hobbyist Programmer Join Date: May 2005 Location: Indiana Posts: 130 Rep Power: 4	Here's something else I found: clicky Then scroll down to the time.h and look at the example program, seems like it has what you you are looking for, which is basically same as what DaWei said. Only this is a ready-made code ps: I couldn't read the descriptions of the time functions, Mozilla times me out but example compiled and worked. __________________ got math? yumm... "All men by nature desire to know" -Aristotle, Metaphysics

Jun 28th, 2005, 11:30 PM	#7
nindoja Programmer Join Date: Jun 2005 Posts: 92 Rep Power: 4	This works on windows systems: (Toggle Plain Text) char dateStr[9]; _strdate(dateStr); char dateStr[9]; _strdate(dateStr);

Jun 29th, 2005, 8:25 AM	#9
nnxion Programming Guru Join Date: Jun 2005 Location: elemental plane Posts: 1,429 Rep Power: 5	Like post #3 said, fill the tmtime structure and get your information from there. __________________ "Employ your time in improving yourself by other men's writings, so that you shall gain easily what others have labored hard for." -- Socrates

Jun 28th, 2005, 10:23 PM	#3
DaWei Resident Grouch Join Date: Jun 2005 Posts: 6,453 Rep Power: 10	Refer to your documentation regarding "time", "asctime", "mktime". You'll encounter additional references along the way. Essentially, you'll start with the number of seconds elapsed since the epoch (January 1, 1970) and feed that to other functions to fill in a structure containing the things you want. The precise functions may turn out to be wrappers for newer functions using 64-bit rather than 32-bit values. Mileage varies, but it's all there for the picking. __________________ Abstraction doesn't make it impossible to write bad code; it makes it possible to write superior code. Contributor's Corner: Grumpy on C++ Exceptions DaWei on Pointers

Jun 28th, 2005, 10:42 PM	#5
Navid Hobbyist Programmer Join Date: Feb 2005 Location: Canada Posts: 187 Rep Power: 4	hmm... I'll just request it to be inputed from the user for now. But thanks i didnt know about those dos commands.

Jun 29th, 2005, 8:41 AM	#10
Nuticulus Programmer Join Date: May 2005 Location: England Posts: 61 Rep Power: 4	Like posts above, I recommend you use time.h. It's full of functions for getting the time. Here's a reference. Nice and simple. If you need microseconds, you can use gettimeofday() under *nix. Read the manual pages for how to use it. I can't remember how to get the time in milliseconds under Windows right now. It may come back to me later. __________________ http://www.nuticulus.net/hackmysig/sig.PNG Give my site a chance, you know you want to ;-) Google will solve 99% of your problems. Including those with your sex life. Caution, may <strike>contain</strike> be nuts.

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Programming Forums > Application Development > C

Getting the Date