Re: Convert from a __TIME__ string to ...

Hey All,

Been busy but still here. As I was told by some, __TIME__ is
generated by the asctime() function.

I disagreed and put it to the test. As I had figured, the output in
string format showed two different time values.

I was directed to the WG14/N1124 Commitee Draft ISO/IEC 9899:TC2
dated May 6, 2005. Which it states the following;

"a character string literal of the form "hh:mm:ss" as in the time
generated by
the asctime function."

I think some have mis-understood what was being implement as a predefinned
complilier macro.

You can see for yourself with my program result and example:

1. display the value of __TIME__ macro
2 display the value of returned from asctime() function
3 again, display the value of __TIME__ macro

// asctime.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"

#include <stdio.h>
#include <time.h>

int main( void)
{
struct tm *newtime;
time_t szclock;

printf_s( "%s\n\r", __TIME__ );

time( &szclock);

newtime = localtime( &szclock);

printf_s( "%s \t %s\n\r", asctime( newtime ), __TIME__ );

return 0;
}

This is the following from the output;

01:22:16
Thu Aug 30 01:26:43 2007
 01:22:16

As you can, even I without my using my glasses, the results are not equal.
Hence, __TIME__ is when the the program was compilied. And asctime()
actually samples the system date/time.

Conclusion, asctime() does not generate the value held by __TIME__ macro.