Display System Time

GeorgeS

How do you display the system time? Is there a function, e.g. time.h?
I'm using RedHat Linux and writing code in C. I need to constantly display 9using a loop) the system time and maybe date in a standard format.

Thanks,
George

Geeth Asokan

Hi,

As far as I know there are functions [b]time()[/b] and [b]ctime()[/b] in C/C++.

Here are some examples of how to use them.

[code]
//Program uses ctime to convert a time_t variable into a human readable
//string in form Fri Jan 28 00:00:00 2000



#include
#include
int main()
{
time_t hold_time;
hold_time=time(NULL);
cout<<"The date is: "<<ctime(&hold_time);

return 0;
}
[/code]

[code]

//Program will use time_t to store number of seconds since 00:00:00 GMT Jan.
//1, 1970

#include <time.h>
#include

int main()
{
time_t hold_time;
hold_time=time(NULL);

cout<<"The number of elapsed seconds since Jan. 1, 1970 is "<<hold_time;

return 0;
}
[/code]

Hope this helps,

GeorgeS

Thank you very much. Immediately after I posted my message I found time.h and a very good Unix site which provided useful examples also.
Again, I appreciate your help.

azidstar

: Thank you very much. Immediately after I posted my message I found time.h and a very good Unix site which provided useful examples also.
: Again, I appreciate your help.
:
Heres another example. Maybe a little bit overkill, but ...

use the system(); func to call time in the system.
Now the problem with system is that it just returns a value if succeded or not. So you have to pipe the output to a textfile and read it.

system("time > dateTextFile");

I know this is a very complicated way to solve the problem, but maybe you will have some use of the system command some other time ;-)
Is there someone out there who has a good way of catching the output of system() ???