strftime，strptime系统函数

#include<stdio.h>

#include<stdlib.h>

#include<time.h>

int main(){
  struct tm *tm_ptr,timestruct;
  time_t the_time;
  char buf[256];

  (void) time(&the_time);
  tm_ptr=localtime(&the_time);
  strftime(buf,256,"%Y-%m-%d %A %d %B,%I:%S %p",tm_ptr);
  printf("strftime gives: %s\n",buf);

  strcpy(buf,"Sat 26 July 2003,17:53:24 will do fine");

  printf("calling strptime with: %s\n",buf);
  tm_ptr=&timestruct;

  //result=strptime(buf,"%a %d %b %Y,%R",tm_ptr);

 result=strptime(buf,"%a %d %b %Y,%H:%M:%S",tm_ptr);
  printf("strptime consumed up to: %s\n",result);

  printf("strptime gives:\n");
  printf("date: %02d/%02d/%02d\n",tm_ptr->tm_year%100,tm_ptr->tm_mon+1,tm_ptr->tm_mday);
  printf("time: %02d:%02d\n",tm_ptr->tm_hour,tm_ptr->tm_min);
  exit(0);
}