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  1. #include <stdio.h>
  2. #include <time.h>
  3.  
  4. char *c89_asctime(const struct tm *timeptr)
  5. {
  6.     static const char wday_name[7][3] = {
  7.              "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
  8.     };
  9.     static const char mon_name[12][3] = {
  10.              "Jan", "Feb", "Mar", "Apr", "May", "Jun",
  11.              "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
  12.     };
  13.     static char result[26];
  14.  
  15.     sprintf(result, "%.3s %.3s%3d %.2d:%.2d:%.2d %d\n",
  16.              wday_name[timeptr->tm_wday],
  17.              mon_name[timeptr->tm_mon],
  18.              timeptr->tm_mday, timeptr->tm_hour,
  19.              timeptr->tm_min, timeptr->tm_sec,
  20.              1900 + timeptr->tm_year);
  21.     return result;
  22. }
  23.  
  24.  
  25. int main(void) {
  26.     struct tm   broken_down;
  27.     broken_down.tm_year = 2000 - 1900;
  28.     broken_down.tm_mon = 0;
  29.     broken_down.tm_mday = 1;
  30.     broken_down.tm_hour = broken_down.tm_min = broken_down.tm_sec = 0;
  31.  
  32.     printf("Current date and time: %s", asctime(&broken_down));
  33.     printf("C89 asctime result is: %s", c89_asctime(&broken_down));
  34. }
Success #stdin #stdout 0s 9424KB
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Standard input is empty
stdout
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Current date and time: Sun Jan  1 00:00:00 2000
C89 asctime result is: Sun Jan  1 00:00:00 2000
https://ideone.com/0FoYs4
language:
C (gcc 8.3)
created:
6 years ago
visibility:
public

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