C++如何使用时间函数（1）

来源：互联网发布：风险评估算法编辑：程序博客网时间：2024/05/10 22:37

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

int main(void)
{
  const char *Day[7] = {
               "Sunday"  , "Monday", "Tuesday", "Wednesday",
               "Thursday", "Friday", "Saturday"
                     };
  const char *Month[12] = {
                  "January", "February", "March", "April",
                  "May",    "June",    "July",    "August",
                  "September", "October",  "November", "December"
                        };
  const char *Suffix[4] = { "st", "nd", "rd", "th" };
  enum sufindex { st, nd, rd, th } sufsel = th;    /* Suffix selector */

  struct tm *OurT = NULL;             /* Pointer for the time structure */
  time_t Tval = 0;                   /* Calendar time                */

  Tval = time(NULL);                /* Get calendar time             */
  OurT = localtime(&Tval);          /* Generate time structure       */

  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("\nThe time is %d : %d : %d",
OurT->tm_hour, OurT->tm_min, OurT->tm_sec );
  return 0;
}