C programming. show current date.

#include <sys/time.h>

int show_date(){

time_t tt;

struct tm *the_tm;

time(&tt);

the_tm = localtime(&tt);

printf("tm_year = %04d-%02d-%02d\n", the_tm->tm_year + 1900, the_tm->tm_mon, the_tm->tm_mday);

return 0;

}