基于tm结构输出日期和月份

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

int main(void)
{
   const char *day[7] = {
      Sunday  , Monday, Tuesday, Wednesday,
      Thursday, Friday, Saturday
   };/*www  . j a v a2 s  . co  m*/
   const char *month[12] = {
      January,   February, march,    April,
      May,       June,     July,     August,
      September, October,  November, December
   };
   const char *suffix[] = { st, nd, rd, th };
   enum sufindex { st, nd, rd, th } sufsel = th;       // Suffix selector

   struct tm ourT;                                     // The time structure
   time_t tVal = time(NULL);                           // Calendar time

   if (!localtime(&tVal))                      // Populate time structure
   {
      fprintf(stderr, Failed to populate tm struct.\n);
      return -1;
   }
   switch (ourT.tm_mday)
   {
   case 1: case 21: case 31:
      sufsel = st;
      break;
   case 2: case 22:
      sufsel = nd;
      break;
   case 3: case 23:
      sufsel = rd;
      break;
   default:
      sufsel = th;
      break;
   }

   printf(Today is %s the %d%s %s %d. , day[ourT.tm_wday],
      ourT.tm_mday, suffix[sufsel], month[ourT.tm_mon], 1900 + ourT.tm_year);
   printf(The time is %d : %d : %d.\n,
      ourT.tm_hour, ourT.tm_min, ourT.tm_sec);
   return 0;
}