C Programming Code Examples

C > Code Snippets Code Examples

format time and date into a string

format time and date into a string

//Declaration:  size_t strftime(char *str, size_t maxsize, const char *fmt, const struct tm *time); 

    
//Command    Replaced By 
//%a:        Abbreviated weekday name 
//%A:        Full weekday name 
//%b:        Abbreviated month name 
//%B:        Full month name 
//%c:        Standard date and time string 
//%C:        Last two digits of year 
//%d:        Day of month as a decimal (1-31) 
//%D:        month/day/year (added by C99) 
//%e:        Day of month as a decimal (1-31) in a two-character field (added by C99) 
//%F:        year-month-day (added by C99) 
//%g:        Last two digits of year using a week-based year (added by C99) 
//%G:        The year using a week-based year (added by C99) 
//%h:        Abbreviated month name (added by C99) 
//%H:        Hour (0-23) 
//%I:        Hour (1-12) 
//%j:        Day of year as a decimal (1-366) 
//%m:        Month as decimal (1-12) 
//%M:        Minute as decimal (0-59) 
//%n:        A newline (added by C99) 
//%p:        Locale's equivalent of AM or PM 
//%r:        12-hour time (added by C99) 
//%R:        hh:mm (added by C99) 
//%S:        Second as decimal (0-60) 
//%t:        Horizontal tab (added by C99) 
//%T:        hh:mm:ss (added by C99) 
//%u:        Day of week; Monday is first day of week (0-53) (added by C99) 
//%U:        Week of year, Sunday being first day (0-53) 
//%V:        Week of year using a week-based year (added by C99) 
//%w:        Weekday as a decimal (0-6, Sunday being 0) 
//%W:        Week of year, Monday being first day (0-53) 
//%x:        Standard date string 
//%X:        Standard time string 
//%y:        Year in decimal without century (0-99) 
//%Y:        Year including century as decimal 
//%z:        Offset from UTC (added by C99) 
//%Z:        Time zone name 
//%%:        The percent sign 


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

  int main(void)
  {
    struct tm *ptr;
    time_t lt;
    char str[80];

    lt = time(NULL);
    ptr = localtime(<);

    strftime(str, 100, "It is now %H %p.", ptr);
    printf(str);

    return 0;
  }