I am looking for C/C++ code to convert a Unix timestamp (seconds since Jan. 1, 1970) , e.g.
1193060347
to a human-readable date format, e.g.
Mon, 22 Oct 2007 13:39:07 GMT
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Hi fritzke,
If you want to write the code yourself, all you need is a couple of key numbers.
86400 -- the number of seconds in a day.
1461 -- the number of days in 4 years.
Divide your number by 86400. This gives you the number of elapsed days.
Take the number module 86400. This gives you the number of seconds into the target day.
Solve the years 4 at a time. That way the leap year logic plays out the cleanest.
That's about it.
Good Luck,
Kent
The easiest way will be ctime() function:
http://msdn2.microsoft.com
But if you want full control over formatting, use strftime function, but you will have to convert the timestamp to a struct tm first.
The simplest way probably is 'asctime()':
/* ASCTIME.C: This program places the system time
* in the long integer aclock, translates it into the
* structure newtime and then converts it to string
* form for output, using the asctime function.
*/
#include <time.h>
#include <stdio.h>
struct tm *newtime;
time_t aclock;
void main( void )
{
time( &aclock ); /* Get time in seconds */
newtime = localtime( &aclock ); /* Convert time to struct */
/* tm form */
/* Print local time as a string */
printf( "The current date and time are: %s", asctime( newtime ) );
}
>> Use strftime() standard function
>> The easiest way will be ctime() function:
>> The simplest way probably is 'asctime()':
This has to be confusing for fritzke heh. All three of the suggested functions are fine - they just work slightly differently. You can find a reference for these three functions, and the other standard time operations here :
http://www.cplusplus.com/r
Hello experts,
thanks for enlightening me. Now I feel prepared to answer time-related questions myself 8v).
I did a point split since since jaime definitely was first with a valid hint to relevant functions, but jkr and isme... did very shortly afterwards actually provide code which I specifically did ask for.
I hope everyone is fine with my decision.
Thanks again!
Bernd
Business Accounts
Answer for Membership
by: jaime_olivaresPosted on 2007-10-22 at 07:43:16ID: 20123525
Use strftime() standard function