C库函数 gmtime()

#include <stdio.h>

#include <time.h>



#define BST (+1)

#define CCT (+8)



int main () {



   time_t rawtime;

   struct tm *info;



   time(&rawtime);

   /* Get GMT time */

   info = gmtime(&rawtime );



   printf("Current world clock:\n");

   printf("London : %2d:%02d\n", (info->tm_hour+BST)%24, info->tm_min);

   printf("China  : %2d:%02d\n", (info->tm_hour+CCT)%24, info->tm_min);



   return(0);

}