您在寻找gmtime吗？

  struct tm * gmtime（const time_t * clock）; 

外部声明以及tm结构定义都包含在< time.h>包含文件中。 tm结构至少包括以下字段：

 int tm_sec; / * seconds（0  -  60）* / 
 int tm_min; / *分钟（0  -  59）* / 
 int tm_hour; / * hours（0  -  23）* / 
 int tm_mday; / *一月中的某一天（1  -  31）* / 
 int tm_mon; / * ）* / 
 int tm_year; / * year  -  1900 * / 
 int tm_wday; / *星期几（星期日= 0）* / 
 int tm_yday; / * -  365）* / 
 int tm_isdst; / *是夏令时生效吗？* / 
 char * tm_zone; / *时区名称的缩写* / 
 long tm_gmtoff; / *以秒为单位* / 
 

I'm building my own unix time to human readable conversion, and I'm stuck.

I can extract the year just fine, but the day is proving too tricky.

/*
   Converts a 32-bit number of seconds after 01-01-1970 to a _SYSTEMTIME structure
*/
static _SYSTEMTIME Convert(unsigned long a_UnixTime)
{	
	newtime.wMilliseconds = 0;
	newtime.wYear	= (unsigned long)((float)a_UnixTime / (364.24f * 24.f * 60.f * 60.f));
	newtime.wDay	= (a_UnixTime - (unsigned long)((float)newtime.wYear * 364.24f * 24.f * 60.f * 60.f)); // returns 65177

	return newtime;
}

Or is there a built-in function that I've overlooked?

Thanks in advance.

UPDATE:

Hmm... it seems Windows Mobile doesn't support strftime, time or localtime, so I'll still have to roll my own. :(

Are you looking for gmtime?

struct tm * gmtime(const time_t *clock);

External declarations, as well as the tm structure definition, are contained in the <time.h> include file.  The tm structure includes at least the following fields:

       int tm_sec;     /* seconds (0 - 60) */
       int tm_min;     /* minutes (0 - 59) */
       int tm_hour;    /* hours (0 - 23) */
       int tm_mday;    /* day of month (1 - 31) */
       int tm_mon;     /* month of year (0 - 11) */
       int tm_year;    /* year - 1900 */
       int tm_wday;    /* day of week (Sunday = 0) */
       int tm_yday;    /* day of year (0 - 365) */
       int tm_isdst;   /* is summer time in effect? */
       char *tm_zone;  /* abbreviation of timezone name */
       long tm_gmtoff; /* offset from UTC in seconds */