C语言库setlocale()函数

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

int main () {
   time_t currtime;
   struct tm *timer;
   char buffer[80];

   time( &currtime );
   timer = localtime( &currtime );

   printf(Locale is: %s\n, setlocale(LC_ALL, en_GB));
   strftime(buffer,80,%c, timer );
   printf(Date is: %s\n, buffer);

   printf(Locale is: %s\n, setlocale(LC_ALL, de_DE));
   strftime(buffer,80,%c, timer );
   printf(Date is: %s\n, buffer);

   return(0);
}